| 
                 
                    Closing price on 1/8/2015
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    12.80 | 
                 
                
                    | High | 
                    12.80 | 
                 
                
                    | Low | 
                    12.80 | 
                     
                
                    | Volume | 
                    100 | 
                                 
                
                    | Split-adjusted Price | 
                    7.90 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NST Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                1/8/2015
             | 
            
                +0.40 / +3.23%
             |             
            
                12.80
             |           
            
                12.80
             |               
            
                12.80
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                7.90
             |                                 
            
                100
             |            
            
                 
             |                                       
         
    
        
            | 
                1/7/2015
             | 
            
                0.00 / 0.00%
             |             
            
                12.40
             |           
            
                12.40
             |               
            
                12.40
             |                           
            
                12.40
             | 
            
                12.40
             |                     
            
                7.65
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/6/2015
             | 
            
                0.00 / 0.00%
             |             
            
                13.20
             |           
            
                13.20
             |               
            
                12.00
             |                           
            
                12.40
             | 
            
                12.43
             |                     
            
                7.65
             |                                 
            
                1,600
             |            
            
                 
             |                                       
         
    
        
            | 
                1/5/2015
             | 
            
                -0.20 / -1.59%
             |             
            
                12.80
             |           
            
                12.80
             |               
            
                12.40
             |                           
            
                12.40
             | 
            
                12.80
             |                     
            
                7.65
             |                                 
            
                200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/31/2014
             | 
            
                -0.80 / -5.97%
             |             
            
                12.30
             |           
            
                12.70
             |               
            
                12.30
             |                           
            
                12.60
             | 
            
                12.47
             |                     
            
                7.78
             |                                 
            
                1,300
             |            
            
                 
             |                                       
         
    
        
            | 
                12/30/2014
             | 
            
                +0.60 / +4.69%
             |             
            
                12.80
             |           
            
                13.50
             |               
            
                12.80
             |                           
            
                13.40
             | 
            
                13.13
             |                     
            
                8.27
             |                                 
            
                1,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/29/2014
             | 
            
                0.00 / 0.00%
             |             
            
                12.80
             |           
            
                12.80
             |               
            
                12.80
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                7.90
             |                                 
            
                79
             |            
            
                 
             |                                       
         
    
        
            | 
                12/26/2014
             | 
            
                0.00 / 0.00%
             |             
            
                12.80
             |           
            
                12.80
             |               
            
                12.80
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                7.90
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/25/2014
             | 
            
                0.00 / 0.00%
             |             
            
                12.80
             |           
            
                12.80
             |               
            
                12.80
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                7.90
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                12/24/2014
             | 
            
                0.00 / 0.00%
             |             
            
                12.80
             |           
            
                12.80
             |               
            
                12.80
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                7.90
             |                                 
            
                9
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/23/2014
             | 
            
                +0.20 / +1.59%
             |             
            
                12.50
             |           
            
                12.80
             |               
            
                12.50
             |                           
            
                12.80
             | 
            
                12.50
             |                     
            
                7.90
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                12/22/2014
             | 
            
                -0.20 / -1.56%
             |             
            
                12.80
             |           
            
                13.00
             |               
            
                12.50
             |                           
            
                12.60
             | 
            
                12.70
             |                     
            
                7.78
             |                                 
            
                595
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/19/2014
             | 
            
                -0.70 / -5.19%
             |             
            
                14.40
             |           
            
                14.40
             |               
            
                12.20
             |                           
            
                12.80
             | 
            
                12.89
             |                     
            
                7.90
             |                                 
            
                2,064
             |            
            
                 
             |                                       
         
    
        
            | 
                12/18/2014
             | 
            
                +1.20 / +9.76%
             |             
            
                13.50
             |           
            
                13.50
             |               
            
                13.50
             |                           
            
                13.50
             | 
            
                13.50
             |                     
            
                8.33
             |                                 
            
                2,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/17/2014
             | 
            
                0.00 / 0.00%
             |             
            
                12.30
             |           
            
                12.30
             |               
            
                12.30
             |                           
            
                12.30
             | 
            
                12.30
             |                     
            
                7.59
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                12/16/2014
             | 
            
                0.00 / 0.00%
             |             
            
                12.30
             |           
            
                12.30
             |               
            
                12.30
             |                           
            
                12.30
             | 
            
                12.30
             |                     
            
                7.59
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/15/2014
             | 
            
                -0.20 / -1.60%
             |             
            
                13.20
             |           
            
                13.20
             |               
            
                12.20
             |                           
            
                12.30
             | 
            
                12.75
             |                     
            
                7.59
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                12/12/2014
             | 
            
                +0.10 / +0.81%
             |             
            
                12.50
             |           
            
                12.50
             |               
            
                12.50
             |                           
            
                12.50
             | 
            
                12.50
             |                     
            
                7.72
             |                                 
            
                100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/11/2014
             | 
            
                -1.10 / -8.15%
             |             
            
                12.20
             |           
            
                13.30
             |               
            
                12.20
             |                           
            
                12.40
             | 
            
                12.46
             |                     
            
                7.65
             |                                 
            
                1,100
             |            
            
                 
             |                                       
         
    
        
            | 
                12/10/2014
             | 
            
                0.00 / 0.00%
             |             
            
                12.20
             |           
            
                13.50
             |               
            
                12.20
             |                           
            
                13.50
             | 
            
                12.89
             |                     
            
                8.33
             |                                 
            
                800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/9/2014
             | 
            
                +0.80 / +6.30%
             |             
            
                13.50
             |           
            
                13.50
             |               
            
                13.50
             |                           
            
                13.50
             | 
            
                13.50
             |                     
            
                8.33
             |                                 
            
                400
             |            
            
                 
             |                                       
         
    
        
            | 
                12/8/2014
             | 
            
                0.00 / 0.00%
             |             
            
                12.70
             |           
            
                12.70
             |               
            
                12.70
             |                           
            
                12.70
             | 
            
                12.70
             |                     
            
                7.84
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/5/2014
             | 
            
                -0.70 / -5.22%
             |             
            
                12.10
             |           
            
                12.90
             |               
            
                12.10
             |                           
            
                12.70
             | 
            
                12.17
             |                     
            
                7.84
             |                                 
            
                7,300
             |            
            
                 
             |                                       
         
    
        
            | 
                12/4/2014
             | 
            
                +0.40 / +3.08%
             |             
            
                12.20
             |           
            
                13.40
             |               
            
                12.20
             |                           
            
                13.40
             | 
            
                12.39
             |                     
            
                8.27
             |                                 
            
                4,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/3/2014
             | 
            
                0.00 / 0.00%
             |             
            
                13.00
             |           
            
                13.00
             |               
            
                13.00
             |                           
            
                13.00
             | 
            
                13.00
             |                     
            
                8.02
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                12/2/2014
             | 
            
                +0.80 / +6.56%
             |             
            
                13.00
             |           
            
                13.00
             |               
            
                13.00
             |                           
            
                13.00
             | 
            
                13.00
             |                     
            
                8.02
             |                                 
            
                1,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/1/2014
             | 
            
                0.00 / 0.00%
             |             
            
                12.20
             |           
            
                12.20
             |               
            
                12.20
             |                           
            
                12.20
             | 
            
                12.20
             |                     
            
                7.53
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                11/28/2014
             | 
            
                -0.60 / -4.69%
             |             
            
                11.70
             |           
            
                12.30
             |               
            
                11.70
             |                           
            
                12.20
             | 
            
                11.85
             |                     
            
                7.53
             |                                 
            
                1,053
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/27/2014
             | 
            
                0.00 / 0.00%
             |             
            
                12.80
             |           
            
                12.80
             |               
            
                12.80
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                7.90
             |                                 
            
                0
             |            
            
                 
             |                                       
         
    
        
            | 
                11/26/2014
             | 
            
                +0.30 / +2.40%
             |             
            
                12.30
             |           
            
                12.80
             |               
            
                12.30
             |                           
            
                12.80
             | 
            
                12.38
             |                     
            
                7.90
             |                                 
            
                1,700
             |  
            
                 
             |                                                              
             
    
         
    
    
 |