| 
                 
                    Closing price on 9/7/2015
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    23.80 | 
                 
                
                    | High | 
                    23.80 | 
                 
                
                    | Low | 
                    22.70 | 
                     
                
                    | Volume | 
                    1,002,920 | 
                                 
                
                    | Split-adjusted Price | 
                    8.61 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NT2 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/7/2015
             | 
            
                -0.80 / -3.36%
             |             
            
                23.80
             |           
            
                23.80
             |               
            
                22.70
             |                           
            
                23.00
             | 
            
                23.11
             |                     
            
                8.61
             |                                 
            
                1,002,920
             |            
            
                 
             |                                       
         
    
        
            | 
                9/4/2015
             | 
            
                +0.20 / +0.85%
             |             
            
                23.60
             |           
            
                24.10
             |               
            
                23.30
             |                           
            
                23.80
             | 
            
                23.69
             |                     
            
                8.91
             |                                 
            
                1,119,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/3/2015
             | 
            
                -0.70 / -2.88%
             |             
            
                24.30
             |           
            
                24.30
             |               
            
                23.50
             |                           
            
                23.60
             | 
            
                23.84
             |                     
            
                8.84
             |                                 
            
                1,027,890
             |            
            
                 
             |                                       
         
    
        
            | 
                9/1/2015
             | 
            
                +0.20 / +0.83%
             |             
            
                24.10
             |           
            
                24.60
             |               
            
                24.00
             |                           
            
                24.30
             | 
            
                24.29
             |                     
            
                9.10
             |                                 
            
                1,158,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/31/2015
             | 
            
                -0.40 / -1.63%
             |             
            
                24.40
             |           
            
                24.40
             |               
            
                23.70
             |                           
            
                24.10
             | 
            
                24.02
             |                     
            
                9.02
             |                                 
            
                1,192,430
             |            
            
                 
             |                                       
         
    
        
            | 
                8/28/2015
             | 
            
                +0.60 / +2.51%
             |             
            
                24.00
             |           
            
                24.60
             |               
            
                23.90
             |                           
            
                24.50
             | 
            
                24.24
             |                     
            
                9.17
             |                                 
            
                2,001,890
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/27/2015
             | 
            
                +0.30 / +1.27%
             |             
            
                24.00
             |           
            
                24.30
             |               
            
                23.80
             |                           
            
                23.90
             | 
            
                24.03
             |                     
            
                8.95
             |                                 
            
                2,393,230
             |            
            
                 
             |                                       
         
    
        
            | 
                8/26/2015
             | 
            
                +1.40 / +6.31%
             |             
            
                22.10
             |           
            
                23.60
             |               
            
                22.00
             |                           
            
                23.60
             | 
            
                22.87
             |                     
            
                8.84
             |                                 
            
                2,338,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/25/2015
             | 
            
                -0.90 / -3.90%
             |             
            
                22.00
             |           
            
                23.10
             |               
            
                21.90
             |                           
            
                22.20
             | 
            
                22.45
             |                     
            
                8.31
             |                                 
            
                3,226,650
             |            
            
                 
             |                                       
         
    
        
            | 
                8/24/2015
             | 
            
                -1.70 / -6.85%
             |             
            
                24.00
             |           
            
                24.10
             |               
            
                23.10
             |                           
            
                23.10
             | 
            
                23.40
             |                     
            
                8.65
             |                                 
            
                3,260,060
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/21/2015
             | 
            
                -0.50 / -1.98%
             |             
            
                24.90
             |           
            
                25.00
             |               
            
                23.80
             |                           
            
                24.80
             | 
            
                24.36
             |                     
            
                9.29
             |                                 
            
                3,234,440
             |            
            
                 
             |                                       
         
    
        
            | 
                8/20/2015
             | 
            
                -0.20 / -0.78%
             |             
            
                25.50
             |           
            
                25.80
             |               
            
                25.00
             |                           
            
                25.30
             | 
            
                25.41
             |                     
            
                9.47
             |                                 
            
                2,174,520
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/19/2015
             | 
            
                0.00 / 0.00%
             |             
            
                25.30
             |           
            
                25.50
             |               
            
                24.90
             |                           
            
                25.50
             | 
            
                25.23
             |                     
            
                9.55
             |                                 
            
                2,603,910
             |            
            
                 
             |                                       
         
    
        
            | 
                8/18/2015
             | 
            
                +0.50 / +2.00%
             |             
            
                25.00
             |           
            
                25.80
             |               
            
                24.90
             |                           
            
                25.50
             | 
            
                25.36
             |                     
            
                9.55
             |                                 
            
                2,326,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/17/2015
             | 
            
                -0.40 / -1.57%
             |             
            
                25.60
             |           
            
                25.70
             |               
            
                24.80
             |                           
            
                25.00
             | 
            
                25.31
             |                     
            
                9.36
             |                                 
            
                1,873,400
             |            
            
                 
             |                                       
         
    
        
            | 
                8/14/2015
             | 
            
                +0.20 / +0.79%
             |             
            
                25.10
             |           
            
                25.40
             |               
            
                24.90
             |                           
            
                25.40
             | 
            
                25.13
             |                     
            
                9.51
             |                                 
            
                1,565,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/13/2015
             | 
            
                -0.60 / -2.33%
             |             
            
                25.50
             |           
            
                25.50
             |               
            
                24.60
             |                           
            
                25.20
             | 
            
                25.15
             |                     
            
                9.44
             |                                 
            
                3,853,040
             |            
            
                 
             |                                       
         
    
        
            | 
                8/12/2015
             | 
            
                -0.90 / -3.37%
             |             
            
                25.50
             |           
            
                25.90
             |               
            
                24.80
             |                           
            
                25.80
             | 
            
                25.53
             |                     
            
                9.66
             |                                 
            
                2,861,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/11/2015
             | 
            
                -0.40 / -1.48%
             |             
            
                27.00
             |           
            
                27.10
             |               
            
                26.70
             |                           
            
                26.70
             | 
            
                26.92
             |                     
            
                9.34
             |                                 
            
                2,584,680
             |            
            
                 
             |                                       
         
    
        
            | 
                8/10/2015
             | 
            
                +0.20 / +0.74%
             |             
            
                26.90
             |           
            
                27.40
             |               
            
                26.70
             |                           
            
                27.10
             | 
            
                27.06
             |                     
            
                9.48
             |                                 
            
                2,170,220
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/7/2015
             | 
            
                +0.60 / +2.28%
             |             
            
                26.50
             |           
            
                27.10
             |               
            
                26.30
             |                           
            
                26.90
             | 
            
                26.66
             |                     
            
                9.41
             |                                 
            
                2,796,120
             |            
            
                 
             |                                       
         
    
        
            | 
                8/6/2015
             | 
            
                +0.70 / +2.73%
             |             
            
                25.50
             |           
            
                26.50
             |               
            
                25.50
             |                           
            
                26.30
             | 
            
                26.18
             |                     
            
                9.20
             |                                 
            
                5,907,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/5/2015
             | 
            
                +0.70 / +2.81%
             |             
            
                25.00
             |           
            
                25.60
             |               
            
                25.00
             |                           
            
                25.60
             | 
            
                25.44
             |                     
            
                8.96
             |                                 
            
                2,047,940
             |            
            
                 
             |                                       
         
    
        
            | 
                8/4/2015
             | 
            
                -0.10 / -0.40%
             |             
            
                25.00
             |           
            
                25.20
             |               
            
                24.80
             |                           
            
                24.90
             | 
            
                24.95
             |                     
            
                8.71
             |                                 
            
                1,401,370
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/3/2015
             | 
            
                -0.30 / -1.19%
             |             
            
                25.00
             |           
            
                25.10
             |               
            
                24.00
             |                           
            
                25.00
             | 
            
                24.76
             |                     
            
                8.75
             |                                 
            
                3,808,440
             |            
            
                 
             |                                       
         
    
        
            | 
                7/31/2015
             | 
            
                +0.50 / +2.02%
             |             
            
                24.70
             |           
            
                25.30
             |               
            
                24.60
             |                           
            
                25.30
             | 
            
                25.15
             |                     
            
                8.85
             |                                 
            
                3,583,490
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/30/2015
             | 
            
                +0.30 / +1.22%
             |             
            
                24.70
             |           
            
                25.30
             |               
            
                24.50
             |                           
            
                24.80
             | 
            
                24.97
             |                     
            
                8.68
             |                                 
            
                3,698,770
             |            
            
                 
             |                                       
         
    
        
            | 
                7/29/2015
             | 
            
                +0.30 / +1.24%
             |             
            
                24.40
             |           
            
                25.00
             |               
            
                24.30
             |                           
            
                24.50
             | 
            
                24.51
             |                     
            
                8.57
             |                                 
            
                2,880,460
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/28/2015
             | 
            
                +1.20 / +5.22%
             |             
            
                22.90
             |           
            
                24.50
             |               
            
                22.80
             |                           
            
                24.20
             | 
            
                23.67
             |                     
            
                8.47
             |                                 
            
                10,592,840
             |            
            
                 
             |                                       
         
    
        
            | 
                7/27/2015
             | 
            
                -0.10 / -0.43%
             |             
            
                23.10
             |           
            
                23.10
             |               
            
                22.60
             |                           
            
                23.00
             | 
            
                22.86
             |                     
            
                8.05
             |                                 
            
                1,542,910
             |  
            
                 
             |                                                              
             
    
         
    
    
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