| 
                 
                    Closing price on 5/31/2016
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    9.60 | 
                 
                
                    | High | 
                    11.60 | 
                 
                
                    | Low | 
                    9.60 | 
                     
                
                    | Volume | 
                    9,800 | 
                                 
                
                    | Split-adjusted Price | 
                    7.82 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/31/2016
             | 
            
                +0.90 / +8.49%
             |             
            
                9.60
             |           
            
                11.60
             |               
            
                9.60
             |                           
            
                11.50
             | 
            
                10.16
             |                     
            
                7.82
             |                                 
            
                9,800
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2016
             | 
            
                -0.10 / -0.93%
             |             
            
                10.70
             |           
            
                10.70
             |               
            
                9.70
             |                           
            
                10.60
             | 
            
                10.18
             |                     
            
                7.21
             |                                 
            
                700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/27/2016
             | 
            
                -0.50 / -4.46%
             |             
            
                10.10
             |           
            
                11.00
             |               
            
                10.10
             |                           
            
                10.70
             | 
            
                10.17
             |                     
            
                7.28
             |                                 
            
                3,500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/26/2016
             | 
            
                0.00 / 0.00%
             |             
            
                11.20
             |           
            
                11.20
             |               
            
                11.20
             |                           
            
                11.20
             | 
            
                11.20
             |                     
            
                7.62
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/25/2016
             | 
            
                +0.60 / +5.66%
             |             
            
                10.60
             |           
            
                11.20
             |               
            
                10.60
             |                           
            
                11.20
             | 
            
                10.63
             |                     
            
                7.62
             |                                 
            
                1,900
             |            
            
                 
             |                                       
         
    
        
            | 
                5/24/2016
             | 
            
                0.00 / 0.00%
             |             
            
                9.60
             |           
            
                10.60
             |               
            
                9.60
             |                           
            
                10.60
             | 
            
                10.10
             |                     
            
                7.21
             |                                 
            
                200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2016
             | 
            
                -0.40 / -3.64%
             |             
            
                9.90
             |           
            
                10.60
             |               
            
                9.90
             |                           
            
                10.60
             | 
            
                10.05
             |                     
            
                7.21
             |                                 
            
                700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/20/2016
             | 
            
                +1.00 / +10.00%
             |             
            
                10.00
             |           
            
                11.00
             |               
            
                10.00
             |                           
            
                11.00
             | 
            
                10.03
             |                     
            
                7.48
             |                                 
            
                5,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/19/2016
             | 
            
                +0.60 / +6.38%
             |             
            
                9.20
             |           
            
                10.00
             |               
            
                9.10
             |                           
            
                10.00
             | 
            
                9.40
             |                     
            
                6.80
             |                                 
            
                400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/18/2016
             | 
            
                -0.20 / -2.08%
             |             
            
                10.40
             |           
            
                10.40
             |               
            
                9.40
             |                           
            
                9.40
             | 
            
                10.13
             |                     
            
                6.39
             |                                 
            
                400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/17/2016
             | 
            
                -1.00 / -9.43%
             |             
            
                10.50
             |           
            
                11.30
             |               
            
                9.60
             |                           
            
                9.60
             | 
            
                10.60
             |                     
            
                6.53
             |                                 
            
                2,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/16/2016
             | 
            
                -0.10 / -0.93%
             |             
            
                9.70
             |           
            
                10.60
             |               
            
                9.70
             |                           
            
                10.60
             | 
            
                10.33
             |                     
            
                7.21
             |                                 
            
                400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/13/2016
             | 
            
                +0.40 / +3.88%
             |             
            
                10.30
             |           
            
                10.90
             |               
            
                10.30
             |                           
            
                10.70
             | 
            
                10.33
             |                     
            
                7.28
             |                                 
            
                3,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/12/2016
             | 
            
                +0.40 / +4.04%
             |             
            
                10.30
             |           
            
                10.80
             |               
            
                9.00
             |                           
            
                10.30
             | 
            
                9.90
             |                     
            
                7.01
             |                                 
            
                6,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/11/2016
             | 
            
                -1.10 / -10.00%
             |             
            
                9.90
             |           
            
                9.90
             |               
            
                9.90
             |                           
            
                9.90
             | 
            
                9.90
             |                     
            
                6.73
             |                                 
            
                700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2016
             | 
            
                -0.40 / -3.51%
             |             
            
                10.30
             |           
            
                11.00
             |               
            
                10.30
             |                           
            
                11.00
             | 
            
                10.36
             |                     
            
                7.48
             |                                 
            
                1,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2016
             | 
            
                -1.20 / -9.52%
             |             
            
                11.40
             |           
            
                11.40
             |               
            
                11.40
             |                           
            
                11.40
             | 
            
                11.40
             |                     
            
                7.76
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/6/2016
             | 
            
                -1.30 / -9.35%
             |             
            
                12.60
             |           
            
                12.60
             |               
            
                12.60
             |                           
            
                12.60
             | 
            
                12.60
             |                     
            
                8.57
             |                                 
            
                200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/5/2016
             | 
            
                -0.10 / -0.71%
             |             
            
                12.60
             |           
            
                13.90
             |               
            
                12.60
             |                           
            
                13.90
             | 
            
                12.65
             |                     
            
                9.46
             |                                 
            
                2,500
             |            
            
                 
             |                                       
         
    
        
            | 
                5/4/2016
             | 
            
                0.00 / 0.00%
             |             
            
                14.00
             |           
            
                14.00
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.00
             |                     
            
                9.52
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/29/2016
             | 
            
                +0.60 / +4.48%
             |             
            
                14.00
             |           
            
                14.00
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.00
             |                     
            
                9.52
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/28/2016
             | 
            
                -0.10 / -0.74%
             |             
            
                14.70
             |           
            
                14.70
             |               
            
                12.20
             |                           
            
                13.40
             | 
            
                12.50
             |                     
            
                9.12
             |                                 
            
                3,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/27/2016
             | 
            
                -1.50 / -10.00%
             |             
            
                13.50
             |           
            
                13.50
             |               
            
                13.50
             |                           
            
                13.50
             | 
            
                13.50
             |                     
            
                9.18
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/26/2016
             | 
            
                0.00 / 0.00%
             |             
            
                15.00
             |           
            
                15.00
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.00
             |                     
            
                10.20
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/25/2016
             | 
            
                0.00 / 0.00%
             |             
            
                15.00
             |           
            
                15.00
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.00
             |                     
            
                10.20
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/22/2016
             | 
            
                0.00 / 0.00%
             |             
            
                15.00
             |           
            
                15.00
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.00
             |                     
            
                10.20
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/21/2016
             | 
            
                0.00 / 0.00%
             |             
            
                15.00
             |           
            
                15.00
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.00
             |                     
            
                10.20
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/20/2016
             | 
            
                0.00 / 0.00%
             |             
            
                15.00
             |           
            
                15.00
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.00
             |                     
            
                10.20
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/19/2016
             | 
            
                0.00 / 0.00%
             |             
            
                15.00
             |           
            
                15.00
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.00
             |                     
            
                10.20
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                4/15/2016
             | 
            
                +0.50 / +3.45%
             |             
            
                15.00
             |           
            
                15.00
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.00
             |                     
            
                10.20
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
         
    
    
 |