| 
                 
                    Closing price on 5/16/2017
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    31.00 | 
                 
                
                    | High | 
                    31.20 | 
                 
                
                    | Low | 
                    30.75 | 
                     
                
                    | Volume | 
                    333,980 | 
                                 
                
                    | Split-adjusted Price | 
                    13.70 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NT2 Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/16/2017
             | 
            
                -0.25 / -0.81%
             |             
            
                31.00
             |           
            
                31.20
             |               
            
                30.75
             |                           
            
                30.75
             | 
            
                30.92
             |                     
            
                13.70
             |                                 
            
                333,980
             |            
            
                 
             |                                       
         
    
        
            | 
                5/15/2017
             | 
            
                -0.70 / -2.21%
             |             
            
                31.50
             |           
            
                31.60
             |               
            
                30.90
             |                           
            
                31.00
             | 
            
                31.17
             |                     
            
                13.81
             |                                 
            
                518,840
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/12/2017
             | 
            
                +0.15 / +0.48%
             |             
            
                31.55
             |           
            
                31.80
             |               
            
                31.50
             |                           
            
                31.70
             | 
            
                31.66
             |                     
            
                14.12
             |                                 
            
                687,420
             |            
            
                 
             |                                       
         
    
        
            | 
                5/11/2017
             | 
            
                +0.55 / +1.77%
             |             
            
                31.00
             |           
            
                31.75
             |               
            
                30.80
             |                           
            
                31.55
             | 
            
                31.47
             |                     
            
                14.06
             |                                 
            
                540,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/10/2017
             | 
            
                +1.00 / +3.33%
             |             
            
                30.20
             |           
            
                31.00
             |               
            
                30.20
             |                           
            
                31.00
             | 
            
                30.58
             |                     
            
                13.81
             |                                 
            
                812,660
             |            
            
                 
             |                                       
         
    
        
            | 
                5/9/2017
             | 
            
                -0.10 / -0.33%
             |             
            
                30.20
             |           
            
                30.25
             |               
            
                29.90
             |                           
            
                30.00
             | 
            
                30.02
             |                     
            
                13.37
             |                                 
            
                255,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/8/2017
             | 
            
                +1.20 / +4.15%
             |             
            
                29.10
             |           
            
                30.20
             |               
            
                29.10
             |                           
            
                30.10
             | 
            
                29.78
             |                     
            
                13.41
             |                                 
            
                613,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/5/2017
             | 
            
                -0.20 / -0.69%
             |             
            
                29.10
             |           
            
                29.10
             |               
            
                28.80
             |                           
            
                28.90
             | 
            
                28.90
             |                     
            
                12.88
             |                                 
            
                595,780
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/4/2017
             | 
            
                -0.85 / -2.84%
             |             
            
                29.95
             |           
            
                29.95
             |               
            
                28.90
             |                           
            
                29.10
             | 
            
                29.26
             |                     
            
                12.97
             |                                 
            
                509,390
             |            
            
                 
             |                                       
         
    
        
            | 
                5/3/2017
             | 
            
                -0.05 / -0.17%
             |             
            
                30.10
             |           
            
                30.10
             |               
            
                29.80
             |                           
            
                29.95
             | 
            
                29.98
             |                     
            
                13.35
             |                                 
            
                249,720
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/28/2017
             | 
            
                -0.50 / -1.64%
             |             
            
                30.30
             |           
            
                30.30
             |               
            
                29.90
             |                           
            
                30.00
             | 
            
                30.02
             |                     
            
                13.37
             |                                 
            
                396,590
             |            
            
                 
             |                                       
         
    
        
            | 
                4/27/2017
             | 
            
                +0.30 / +0.99%
             |             
            
                30.55
             |           
            
                30.70
             |               
            
                30.20
             |                           
            
                30.50
             | 
            
                30.49
             |                     
            
                13.59
             |                                 
            
                68,130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2017
             | 
            
                -0.05 / -0.17%
             |             
            
                30.40
             |           
            
                30.60
             |               
            
                30.20
             |                           
            
                30.20
             | 
            
                30.34
             |                     
            
                13.46
             |                                 
            
                222,340
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2017
             | 
            
                -0.10 / -0.33%
             |             
            
                30.25
             |           
            
                30.50
             |               
            
                30.25
             |                           
            
                30.25
             | 
            
                30.27
             |                     
            
                13.48
             |                                 
            
                53,260
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/24/2017
             | 
            
                -0.25 / -0.82%
             |             
            
                30.60
             |           
            
                30.60
             |               
            
                30.00
             |                           
            
                30.35
             | 
            
                30.37
             |                     
            
                13.52
             |                                 
            
                32,530
             |            
            
                 
             |                                       
         
    
        
            | 
                4/21/2017
             | 
            
                +0.30 / +0.99%
             |             
            
                30.40
             |           
            
                30.70
             |               
            
                30.20
             |                           
            
                30.60
             | 
            
                30.35
             |                     
            
                13.63
             |                                 
            
                150,380
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/20/2017
             | 
            
                -0.40 / -1.30%
             |             
            
                30.70
             |           
            
                30.70
             |               
            
                30.20
             |                           
            
                30.30
             | 
            
                30.33
             |                     
            
                13.50
             |                                 
            
                214,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/19/2017
             | 
            
                +0.50 / +1.66%
             |             
            
                30.20
             |           
            
                30.80
             |               
            
                30.20
             |                           
            
                30.70
             | 
            
                30.73
             |                     
            
                13.68
             |                                 
            
                26,130
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/18/2017
             | 
            
                -0.70 / -2.27%
             |             
            
                30.05
             |           
            
                30.65
             |               
            
                30.05
             |                           
            
                30.20
             | 
            
                30.26
             |                     
            
                13.46
             |                                 
            
                356,120
             |            
            
                 
             |                                       
         
    
        
            | 
                4/17/2017
             | 
            
                +0.10 / +0.32%
             |             
            
                30.90
             |           
            
                31.10
             |               
            
                30.20
             |                           
            
                30.90
             | 
            
                30.77
             |                     
            
                13.77
             |                                 
            
                176,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/14/2017
             | 
            
                -0.50 / -1.60%
             |             
            
                31.50
             |           
            
                31.50
             |               
            
                30.80
             |                           
            
                30.80
             | 
            
                31.22
             |                     
            
                13.72
             |                                 
            
                191,560
             |            
            
                 
             |                                       
         
    
        
            | 
                4/13/2017
             | 
            
                -0.20 / -0.63%
             |             
            
                31.55
             |           
            
                31.55
             |               
            
                31.20
             |                           
            
                31.30
             | 
            
                31.38
             |                     
            
                13.95
             |                                 
            
                108,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/12/2017
             | 
            
                0.00 / 0.00%
             |             
            
                31.55
             |           
            
                31.85
             |               
            
                31.50
             |                           
            
                31.50
             | 
            
                31.70
             |                     
            
                14.04
             |                                 
            
                196,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/11/2017
             | 
            
                +0.10 / +0.32%
             |             
            
                31.40
             |           
            
                31.60
             |               
            
                31.40
             |                           
            
                31.50
             | 
            
                31.50
             |                     
            
                14.04
             |                                 
            
                79,580
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2017
             | 
            
                -0.35 / -1.10%
             |             
            
                31.50
             |           
            
                31.70
             |               
            
                31.30
             |                           
            
                31.40
             | 
            
                31.40
             |                     
            
                13.99
             |                                 
            
                88,110
             |            
            
                 
             |                                       
         
    
        
            | 
                4/7/2017
             | 
            
                -0.20 / -0.63%
             |             
            
                31.90
             |           
            
                31.90
             |               
            
                31.50
             |                           
            
                31.75
             | 
            
                31.78
             |                     
            
                14.15
             |                                 
            
                58,780
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/5/2017
             | 
            
                +0.05 / +0.16%
             |             
            
                31.90
             |           
            
                31.95
             |               
            
                31.80
             |                           
            
                31.95
             | 
            
                31.88
             |                     
            
                14.24
             |                                 
            
                493,630
             |            
            
                 
             |                                       
         
    
        
            | 
                4/4/2017
             | 
            
                +0.15 / +0.47%
             |             
            
                31.70
             |           
            
                31.95
             |               
            
                31.70
             |                           
            
                31.90
             | 
            
                31.86
             |                     
            
                14.21
             |                                 
            
                530,770
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/3/2017
             | 
            
                +0.25 / +0.79%
             |             
            
                31.10
             |           
            
                31.75
             |               
            
                31.10
             |                           
            
                31.75
             | 
            
                31.63
             |                     
            
                14.15
             |                                 
            
                316,280
             |            
            
                 
             |                                       
         
    
        
            | 
                3/31/2017
             | 
            
                -0.45 / -1.41%
             |             
            
                32.20
             |           
            
                32.20
             |               
            
                31.50
             |                           
            
                31.50
             | 
            
                31.74
             |                     
            
                14.04
             |                                 
            
                88,910
             |  
            
                 
             |                                                              
             
    
         
    
    
 |