| 
                 
                    Closing price on 7/29/2015
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    10.10 | 
                 
                
                    | High | 
                    10.80 | 
                 
                
                    | Low | 
                    10.10 | 
                     
                
                    | Volume | 
                    1,100 | 
                                 
                
                    | Split-adjusted Price | 
                    6.67 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                7/29/2015
             | 
            
                -0.40 / -3.57%
             |             
            
                10.10
             |           
            
                10.80
             |               
            
                10.10
             |                           
            
                10.80
             | 
            
                10.16
             |                     
            
                6.67
             |                                 
            
                1,100
             |            
            
                 
             |                                       
         
    
        
            | 
                7/28/2015
             | 
            
                0.00 / 0.00%
             |             
            
                11.20
             |           
            
                11.20
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                6.91
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/27/2015
             | 
            
                -0.60 / -5.08%
             |             
            
                10.70
             |           
            
                11.20
             |               
            
                10.70
             |                           
            
                11.20
             | 
            
                10.95
             |                     
            
                6.91
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                7/24/2015
             | 
            
                0.00 / 0.00%
             |             
            
                11.80
             |           
            
                11.80
             |               
            
                11.80
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                7.28
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/23/2015
             | 
            
                0.00 / 0.00%
             |             
            
                11.80
             |           
            
                11.80
             |               
            
                11.80
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                7.28
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                7/22/2015
             | 
            
                0.00 / 0.00%
             |             
            
                11.80
             |           
            
                11.80
             |               
            
                11.80
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                7.28
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/21/2015
             | 
            
                +0.60 / +5.36%
             |             
            
                10.20
             |           
            
                11.80
             |               
            
                10.20
             |                           
            
                11.80
             | 
            
                10.34
             |                     
            
                7.28
             |                                 
            
                1,405
             |            
            
                 
             |                                       
         
    
        
            | 
                7/20/2015
             | 
            
                0.00 / 0.00%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                10.50
             |                           
            
                11.20
             | 
            
                10.58
             |                     
            
                6.91
             |                                 
            
                1,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/17/2015
             | 
            
                +1.00 / +9.80%
             |             
            
                11.20
             |           
            
                11.20
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                6.91
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                7/16/2015
             | 
            
                -1.10 / -9.73%
             |             
            
                10.20
             |           
            
                10.20
             |               
            
                10.20
             |                           
            
                10.20
             | 
            
                10.20
             |                     
            
                6.30
             |                                 
            
                800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/15/2015
             | 
            
                +0.80 / +7.62%
             |             
            
                11.30
             |           
            
                11.30
             |               
            
                11.30
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                6.98
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                7/14/2015
             | 
            
                -1.10 / -9.48%
             |             
            
                10.50
             |           
            
                10.50
             |               
            
                10.50
             |                           
            
                10.50
             | 
            
                10.50
             |                     
            
                6.48
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/13/2015
             | 
            
                0.00 / 0.00%
             |             
            
                10.50
             |           
            
                11.60
             |               
            
                10.50
             |                           
            
                11.60
             | 
            
                10.56
             |                     
            
                7.16
             |                                 
            
                1,800
             |            
            
                 
             |                                       
         
    
        
            | 
                7/10/2015
             | 
            
                +0.10 / +0.87%
             |             
            
                11.80
             |           
            
                11.80
             |               
            
                10.40
             |                           
            
                11.60
             | 
            
                10.63
             |                     
            
                7.16
             |                                 
            
                1,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/9/2015
             | 
            
                -0.40 / -3.36%
             |             
            
                10.80
             |           
            
                11.50
             |               
            
                10.80
             |                           
            
                11.50
             | 
            
                10.98
             |                     
            
                7.10
             |                                 
            
                2,800
             |            
            
                 
             |                                       
         
    
        
            | 
                7/8/2015
             | 
            
                0.00 / 0.00%
             |             
            
                11.90
             |           
            
                11.90
             |               
            
                11.90
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                7.35
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/7/2015
             | 
            
                0.00 / 0.00%
             |             
            
                11.90
             |           
            
                11.90
             |               
            
                11.90
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                7.35
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                7/6/2015
             | 
            
                +0.80 / +7.21%
             |             
            
                11.90
             |           
            
                11.90
             |               
            
                11.90
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                7.35
             |                                 
            
                200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/3/2015
             | 
            
                -0.40 / -3.48%
             |             
            
                10.70
             |           
            
                11.10
             |               
            
                10.70
             |                           
            
                11.10
             | 
            
                10.80
             |                     
            
                6.85
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                7/2/2015
             | 
            
                +0.80 / +7.48%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                10.00
             |                           
            
                11.50
             | 
            
                10.41
             |                     
            
                7.10
             |                                 
            
                3,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                7/1/2015
             | 
            
                -0.70 / -6.14%
             |             
            
                10.30
             |           
            
                10.70
             |               
            
                10.30
             |                           
            
                10.70
             | 
            
                10.40
             |                     
            
                6.61
             |                                 
            
                2,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/30/2015
             | 
            
                -0.10 / -0.87%
             |             
            
                12.20
             |           
            
                12.20
             |               
            
                10.40
             |                           
            
                11.40
             | 
            
                10.68
             |                     
            
                7.04
             |                                 
            
                9,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/29/2015
             | 
            
                0.00 / 0.00%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.50
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                7.10
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                6/26/2015
             | 
            
                +0.10 / +0.88%
             |             
            
                10.30
             |           
            
                11.50
             |               
            
                10.30
             |                           
            
                11.50
             | 
            
                11.40
             |                     
            
                7.10
             |                                 
            
                2,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/25/2015
             | 
            
                -0.10 / -0.87%
             |             
            
                10.40
             |           
            
                11.40
             |               
            
                10.40
             |                           
            
                11.40
             | 
            
                10.43
             |                     
            
                7.04
             |                                 
            
                3,100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/24/2015
             | 
            
                +0.90 / +8.49%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.50
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                7.10
             |                                 
            
                117
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/23/2015
             | 
            
                -1.10 / -9.40%
             |             
            
                10.60
             |           
            
                11.70
             |               
            
                10.60
             |                           
            
                10.60
             | 
            
                10.70
             |                     
            
                6.54
             |                                 
            
                7,800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/22/2015
             | 
            
                +0.60 / +5.41%
             |             
            
                11.70
             |           
            
                11.70
             |               
            
                11.70
             |                           
            
                11.70
             | 
            
                11.70
             |                     
            
                7.22
             |                                 
            
                173
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/19/2015
             | 
            
                +0.60 / +5.71%
             |             
            
                10.00
             |           
            
                11.20
             |               
            
                10.00
             |                           
            
                11.10
             | 
            
                10.32
             |                     
            
                6.85
             |                                 
            
                2,000
             |            
            
                 
             |                                       
         
    
        
            | 
                6/18/2015
             | 
            
                0.00 / 0.00%
             |             
            
                10.50
             |           
            
                10.50
             |               
            
                10.50
             |                           
            
                10.50
             | 
            
                10.50
             |                     
            
                6.48
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
         
    
    
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