| 
                 
                    Closing price on 2/26/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    36.20 | 
                 
                
                    | High | 
                    36.20 | 
                 
                
                    | Low | 
                    34.60 | 
                     
                
                    | Volume | 
                    110,900 | 
                                 
                
                    | Split-adjusted Price | 
                    17.42 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NRC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                2/26/2019
             | 
            
                0.00 / 0.00%
             |             
            
                36.20
             |           
            
                36.20
             |               
            
                34.60
             |                           
            
                36.00
             | 
            
                35.10
             |                     
            
                17.42
             |                                 
            
                110,900
             |            
            
                 
             |                                       
         
    
        
            | 
                2/25/2019
             | 
            
                +0.70 / +1.98%
             |             
            
                35.50
             |           
            
                36.00
             |               
            
                35.40
             |                           
            
                36.00
             | 
            
                35.69
             |                     
            
                17.42
             |                                 
            
                71,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/22/2019
             | 
            
                +0.40 / +1.15%
             |             
            
                35.20
             |           
            
                35.30
             |               
            
                34.50
             |                           
            
                35.30
             | 
            
                35.05
             |                     
            
                17.08
             |                                 
            
                56,600
             |            
            
                 
             |                                       
         
    
        
            | 
                2/21/2019
             | 
            
                -0.10 / -0.29%
             |             
            
                34.80
             |           
            
                35.20
             |               
            
                34.50
             |                           
            
                34.90
             | 
            
                34.87
             |                     
            
                16.88
             |                                 
            
                38,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/20/2019
             | 
            
                -0.10 / -0.28%
             |             
            
                35.30
             |           
            
                36.40
             |               
            
                34.30
             |                           
            
                35.00
             | 
            
                34.90
             |                     
            
                16.93
             |                                 
            
                31,300
             |            
            
                 
             |                                       
         
    
        
            | 
                2/19/2019
             | 
            
                +0.30 / +0.86%
             |             
            
                34.80
             |           
            
                36.30
             |               
            
                34.70
             |                           
            
                35.10
             | 
            
                35.29
             |                     
            
                16.98
             |                                 
            
                28,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/18/2019
             | 
            
                +0.20 / +0.58%
             |             
            
                34.80
             |           
            
                35.80
             |               
            
                33.70
             |                           
            
                34.80
             | 
            
                34.65
             |                     
            
                16.84
             |                                 
            
                70,500
             |            
            
                 
             |                                       
         
    
        
            | 
                2/15/2019
             | 
            
                -0.50 / -1.42%
             |             
            
                35.10
             |           
            
                35.20
             |               
            
                34.00
             |                           
            
                34.60
             | 
            
                34.62
             |                     
            
                16.74
             |                                 
            
                24,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/14/2019
             | 
            
                +0.10 / +0.29%
             |             
            
                35.00
             |           
            
                35.10
             |               
            
                34.30
             |                           
            
                35.10
             | 
            
                34.79
             |                     
            
                16.98
             |                                 
            
                31,800
             |            
            
                 
             |                                       
         
    
        
            | 
                2/13/2019
             | 
            
                -0.80 / -2.23%
             |             
            
                35.80
             |           
            
                36.80
             |               
            
                34.50
             |                           
            
                35.00
             | 
            
                35.67
             |                     
            
                16.93
             |                                 
            
                37,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/12/2019
             | 
            
                -0.30 / -0.83%
             |             
            
                36.10
             |           
            
                36.80
             |               
            
                34.50
             |                           
            
                35.80
             | 
            
                35.73
             |                     
            
                17.32
             |                                 
            
                37,900
             |            
            
                 
             |                                       
         
    
        
            | 
                2/11/2019
             | 
            
                0.00 / 0.00%
             |             
            
                36.30
             |           
            
                36.80
             |               
            
                34.70
             |                           
            
                36.10
             | 
            
                35.91
             |                     
            
                17.46
             |                                 
            
                39,210
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/1/2019
             | 
            
                -0.10 / -0.28%
             |             
            
                35.50
             |           
            
                36.80
             |               
            
                35.50
             |                           
            
                36.10
             | 
            
                36.07
             |                     
            
                17.46
             |                                 
            
                36,600
             |            
            
                 
             |                                       
         
    
        
            | 
                1/31/2019
             | 
            
                +0.10 / +0.28%
             |             
            
                36.30
             |           
            
                36.40
             |               
            
                36.10
             |                           
            
                36.20
             | 
            
                36.25
             |                     
            
                17.51
             |                                 
            
                35,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/30/2019
             | 
            
                +0.10 / +0.28%
             |             
            
                36.50
             |           
            
                36.50
             |               
            
                36.00
             |                           
            
                36.10
             | 
            
                36.18
             |                     
            
                17.46
             |                                 
            
                33,800
             |            
            
                 
             |                                       
         
    
        
            | 
                1/29/2019
             | 
            
                0.00 / 0.00%
             |             
            
                36.50
             |           
            
                36.50
             |               
            
                35.50
             |                           
            
                36.00
             | 
            
                36.08
             |                     
            
                17.42
             |                                 
            
                72,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/28/2019
             | 
            
                -1.00 / -2.70%
             |             
            
                37.00
             |           
            
                38.00
             |               
            
                35.50
             |                           
            
                36.00
             | 
            
                36.56
             |                     
            
                17.42
             |                                 
            
                43,400
             |            
            
                 
             |                                       
         
    
        
            | 
                1/25/2019
             | 
            
                -0.50 / -1.33%
             |             
            
                37.50
             |           
            
                38.00
             |               
            
                36.10
             |                           
            
                37.00
             | 
            
                36.51
             |                     
            
                17.90
             |                                 
            
                18,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/24/2019
             | 
            
                -0.50 / -1.32%
             |             
            
                38.00
             |           
            
                41.00
             |               
            
                36.00
             |                           
            
                37.50
             | 
            
                37.26
             |                     
            
                18.14
             |                                 
            
                32,300
             |            
            
                 
             |                                       
         
    
        
            | 
                1/23/2019
             | 
            
                +1.90 / +5.26%
             |             
            
                37.00
             |           
            
                39.70
             |               
            
                35.90
             |                           
            
                38.00
             | 
            
                36.73
             |                     
            
                18.38
             |                                 
            
                1,231,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/22/2019
             | 
            
                -1.90 / -5.00%
             |             
            
                38.00
             |           
            
                39.00
             |               
            
                35.70
             |                           
            
                36.10
             | 
            
                36.88
             |                     
            
                17.46
             |                                 
            
                55,900
             |            
            
                 
             |                                       
         
    
        
            | 
                1/21/2019
             | 
            
                -1.50 / -3.80%
             |             
            
                39.00
             |           
            
                39.50
             |               
            
                37.70
             |                           
            
                38.00
             | 
            
                38.47
             |                     
            
                18.38
             |                                 
            
                29,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/18/2019
             | 
            
                -1.50 / -3.66%
             |             
            
                40.00
             |           
            
                43.00
             |               
            
                38.40
             |                           
            
                39.50
             | 
            
                39.32
             |                     
            
                19.11
             |                                 
            
                31,000
             |            
            
                 
             |                                       
         
    
        
            | 
                1/17/2019
             | 
            
                -1.00 / -2.38%
             |             
            
                41.00
             |           
            
                42.00
             |               
            
                39.00
             |                           
            
                41.00
             | 
            
                39.84
             |                     
            
                19.83
             |                                 
            
                28,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/16/2019
             | 
            
                +3.00 / +7.69%
             |             
            
                39.00
             |           
            
                42.00
             |               
            
                38.80
             |                           
            
                42.00
             | 
            
                39.64
             |                     
            
                20.32
             |                                 
            
                40,000
             |            
            
                 
             |                                       
         
    
        
            | 
                1/15/2019
             | 
            
                +1.10 / +2.90%
             |             
            
                39.00
             |           
            
                39.00
             |               
            
                37.90
             |                           
            
                39.00
             | 
            
                38.60
             |                     
            
                18.87
             |                                 
            
                43,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/14/2019
             | 
            
                -0.50 / -1.30%
             |             
            
                38.00
             |           
            
                38.50
             |               
            
                37.90
             |                           
            
                37.90
             | 
            
                38.13
             |                     
            
                18.33
             |                                 
            
                31,500
             |            
            
                 
             |                                       
         
    
        
            | 
                1/11/2019
             | 
            
                +0.40 / +1.05%
             |             
            
                38.00
             |           
            
                41.00
             |               
            
                37.80
             |                           
            
                38.40
             | 
            
                38.12
             |                     
            
                18.58
             |                                 
            
                26,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/10/2019
             | 
            
                -0.30 / -0.78%
             |             
            
                38.30
             |           
            
                38.50
             |               
            
                37.80
             |                           
            
                38.00
             | 
            
                38.22
             |                     
            
                18.38
             |                                 
            
                31,700
             |            
            
                 
             |                                       
         
    
        
            | 
                1/9/2019
             | 
            
                0.00 / 0.00%
             |             
            
                38.30
             |           
            
                42.10
             |               
            
                38.30
             |                           
            
                38.30
             | 
            
                38.56
             |                     
            
                18.53
             |                                 
            
                40,600
             |  
            
                 
             |                                                              
             
    
         
    
    
 |