| 
                 
                    Closing price on 6/10/2015
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    10.50 | 
                 
                
                    | High | 
                    10.50 | 
                 
                
                    | Low | 
                    10.50 | 
                     
                
                    | Volume | 
                    100 | 
                                 
                
                    | Split-adjusted Price | 
                    6.48 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/10/2015
             | 
            
                +0.50 / +5.00%
             |             
            
                10.50
             |           
            
                10.50
             |               
            
                10.50
             |                           
            
                10.50
             | 
            
                10.50
             |                     
            
                6.48
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/9/2015
             | 
            
                -0.50 / -4.76%
             |             
            
                9.60
             |           
            
                10.00
             |               
            
                9.50
             |                           
            
                10.00
             | 
            
                9.56
             |                     
            
                6.17
             |                                 
            
                1,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/8/2015
             | 
            
                -0.10 / -0.94%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                9.60
             |                           
            
                10.50
             | 
            
                9.69
             |                     
            
                6.48
             |                                 
            
                15,400
             |            
            
                 
             |                                       
         
    
        
            | 
                6/5/2015
             | 
            
                -0.90 / -7.83%
             |             
            
                10.40
             |           
            
                10.60
             |               
            
                10.40
             |                           
            
                10.60
             | 
            
                10.40
             |                     
            
                6.54
             |                                 
            
                2,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/4/2015
             | 
            
                0.00 / 0.00%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.50
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                7.10
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                6/3/2015
             | 
            
                0.00 / 0.00%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.50
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                7.10
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/2/2015
             | 
            
                +0.30 / +2.68%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.50
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                7.10
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/1/2015
             | 
            
                0.00 / 0.00%
             |             
            
                11.20
             |           
            
                11.20
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                6.91
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/29/2015
             | 
            
                +0.80 / +7.69%
             |             
            
                11.20
             |           
            
                11.20
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                6.91
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/28/2015
             | 
            
                -0.10 / -0.95%
             |             
            
                10.00
             |           
            
                10.40
             |               
            
                9.80
             |                           
            
                10.40
             | 
            
                9.88
             |                     
            
                6.42
             |                                 
            
                5,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/27/2015
             | 
            
                -1.00 / -8.70%
             |             
            
                10.40
             |           
            
                10.50
             |               
            
                10.40
             |                           
            
                10.50
             | 
            
                10.40
             |                     
            
                6.48
             |                                 
            
                1,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/26/2015
             | 
            
                +1.00 / +9.52%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.50
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                7.10
             |                                 
            
                200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/25/2015
             | 
            
                -0.50 / -4.55%
             |             
            
                10.50
             |           
            
                10.50
             |               
            
                10.50
             |                           
            
                10.50
             | 
            
                10.50
             |                     
            
                6.48
             |                                 
            
                8,783
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2015
             | 
            
                0.00 / 0.00%
             |             
            
                11.00
             |           
            
                11.00
             |               
            
                11.00
             |                           
            
                11.00
             | 
            
                11.00
             |                     
            
                6.79
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/21/2015
             | 
            
                0.00 / 0.00%
             |             
            
                11.00
             |           
            
                11.00
             |               
            
                11.00
             |                           
            
                11.00
             | 
            
                11.00
             |                     
            
                6.79
             |                                 
            
                50
             |            
            
                 
             |                                       
         
    
        
            | 
                5/20/2015
             | 
            
                -0.50 / -4.35%
             |             
            
                10.40
             |           
            
                11.00
             |               
            
                10.40
             |                           
            
                11.00
             | 
            
                10.46
             |                     
            
                6.79
             |                                 
            
                12,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/19/2015
             | 
            
                +0.80 / +7.48%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.50
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                7.10
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/18/2015
             | 
            
                -1.10 / -9.32%
             |             
            
                10.70
             |           
            
                10.70
             |               
            
                10.70
             |                           
            
                10.70
             | 
            
                10.70
             |                     
            
                6.61
             |                                 
            
                500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/15/2015
             | 
            
                +0.90 / +8.26%
             |             
            
                11.80
             |           
            
                11.80
             |               
            
                11.80
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                7.28
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2015
             | 
            
                -0.10 / -0.91%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                10.90
             |                           
            
                10.90
             | 
            
                11.45
             |                     
            
                6.73
             |                                 
            
                200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/13/2015
             | 
            
                -0.60 / -5.17%
             |             
            
                11.90
             |           
            
                11.90
             |               
            
                11.00
             |                           
            
                11.00
             | 
            
                11.45
             |                     
            
                6.79
             |                                 
            
                200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/12/2015
             | 
            
                -1.20 / -9.38%
             |             
            
                11.60
             |           
            
                11.60
             |               
            
                11.60
             |                           
            
                11.60
             | 
            
                11.60
             |                     
            
                7.16
             |                                 
            
                1,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/11/2015
             | 
            
                +0.70 / +5.79%
             |             
            
                13.20
             |           
            
                13.20
             |               
            
                10.90
             |                           
            
                12.80
             | 
            
                11.74
             |                     
            
                7.90
             |                                 
            
                550
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2015
             | 
            
                +0.80 / +7.08%
             |             
            
                12.10
             |           
            
                12.10
             |               
            
                12.10
             |                           
            
                12.10
             | 
            
                12.10
             |                     
            
                7.47
             |                                 
            
                2,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/7/2015
             | 
            
                -1.00 / -8.13%
             |             
            
                11.10
             |           
            
                11.30
             |               
            
                11.10
             |                           
            
                11.30
             | 
            
                11.10
             |                     
            
                6.98
             |                                 
            
                2,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/6/2015
             | 
            
                +0.80 / +6.96%
             |             
            
                11.60
             |           
            
                12.30
             |               
            
                11.60
             |                           
            
                12.30
             | 
            
                11.95
             |                     
            
                7.59
             |                                 
            
                5,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/5/2015
             | 
            
                0.00 / 0.00%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.50
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                7.10
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                5/4/2015
             | 
            
                0.00 / 0.00%
             |             
            
                11.50
             |           
            
                11.50
             |               
            
                11.50
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                7.10
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/27/2015
             | 
            
                -0.10 / -0.86%
             |             
            
                10.60
             |           
            
                11.60
             |               
            
                10.50
             |                           
            
                11.50
             | 
            
                10.97
             |                     
            
                7.10
             |                                 
            
                2,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/24/2015
             | 
            
                -0.40 / -3.33%
             |             
            
                11.00
             |           
            
                11.70
             |               
            
                10.80
             |                           
            
                11.60
             | 
            
                10.84
             |                     
            
                7.16
             |                                 
            
                10,000
             |  
            
                 
             |                                                              
             
    
         
    
    
 |