| 
                 
                    Closing price on 1/30/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    36.50 | 
                 
                
                    | High | 
                    36.50 | 
                 
                
                    | Low | 
                    36.00 | 
                     
                
                    | Volume | 
                    33,800 | 
                                 
                
                    | Split-adjusted Price | 
                    17.46 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NRC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                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
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/8/2019
             | 
            
                -0.10 / -0.26%
             |             
            
                38.30
             |           
            
                38.40
             |               
            
                38.00
             |                           
            
                38.30
             | 
            
                38.20
             |                     
            
                18.53
             |                                 
            
                53,800
             |            
            
                 
             |                                       
         
    
        
            | 
                1/7/2019
             | 
            
                0.00 / 0.00%
             |             
            
                38.20
             |           
            
                38.40
             |               
            
                38.00
             |                           
            
                38.40
             | 
            
                38.14
             |                     
            
                18.58
             |                                 
            
                48,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/4/2019
             | 
            
                -0.10 / -0.26%
             |             
            
                38.50
             |           
            
                38.50
             |               
            
                38.00
             |                           
            
                38.40
             | 
            
                38.16
             |                     
            
                18.58
             |                                 
            
                50,100
             |            
            
                 
             |                                       
         
    
        
            | 
                1/3/2019
             | 
            
                -0.30 / -0.77%
             |             
            
                38.80
             |           
            
                38.80
             |               
            
                38.30
             |                           
            
                38.50
             | 
            
                38.56
             |                     
            
                18.63
             |                                 
            
                52,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/2/2019
             | 
            
                -0.20 / -0.51%
             |             
            
                39.00
             |           
            
                39.20
             |               
            
                38.70
             |                           
            
                38.80
             | 
            
                38.92
             |                     
            
                18.77
             |                                 
            
                57,500
             |            
            
                 
             |                                       
         
    
        
            | 
                12/28/2018
             | 
            
                -0.40 / -1.02%
             |             
            
                39.40
             |           
            
                39.40
             |               
            
                39.00
             |                           
            
                39.00
             | 
            
                39.16
             |                     
            
                18.87
             |                                 
            
                56,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/27/2018
             | 
            
                -0.60 / -1.50%
             |             
            
                40.00
             |           
            
                40.30
             |               
            
                39.40
             |                           
            
                39.40
             | 
            
                39.73
             |                     
            
                19.06
             |                                 
            
                53,600
             |            
            
                 
             |                                       
         
    
        
            | 
                12/26/2018
             | 
            
                +0.20 / +0.50%
             |             
            
                39.80
             |           
            
                40.00
             |               
            
                39.70
             |                           
            
                40.00
             | 
            
                39.88
             |                     
            
                19.35
             |                                 
            
                210,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/25/2018
             | 
            
                -0.60 / -1.49%
             |             
            
                40.40
             |           
            
                40.40
             |               
            
                39.80
             |                           
            
                39.80
             | 
            
                40.07
             |                     
            
                19.25
             |                                 
            
                22,600
             |            
            
                 
             |                                       
         
    
        
            | 
                12/24/2018
             | 
            
                0.00 / 0.00%
             |             
            
                40.40
             |           
            
                40.40
             |               
            
                40.00
             |                           
            
                40.40
             | 
            
                40.29
             |                     
            
                19.54
             |                                 
            
                27,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/21/2018
             | 
            
                0.00 / 0.00%
             |             
            
                40.30
             |           
            
                40.40
             |               
            
                40.10
             |                           
            
                40.40
             | 
            
                40.28
             |                     
            
                19.54
             |                                 
            
                25,400
             |            
            
                 
             |                                       
         
    
        
            | 
                12/20/2018
             | 
            
                0.00 / 0.00%
             |             
            
                40.30
             |           
            
                40.40
             |               
            
                40.20
             |                           
            
                40.40
             | 
            
                40.31
             |                     
            
                19.54
             |                                 
            
                21,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/19/2018
             | 
            
                -0.10 / -0.25%
             |             
            
                40.50
             |           
            
                40.50
             |               
            
                40.20
             |                           
            
                40.40
             | 
            
                40.29
             |                     
            
                19.54
             |                                 
            
                20,800
             |            
            
                 
             |                                       
         
    
        
            | 
                12/18/2018
             | 
            
                -0.10 / -0.25%
             |             
            
                40.60
             |           
            
                40.60
             |               
            
                40.20
             |                           
            
                40.50
             | 
            
                40.45
             |                     
            
                19.59
             |                                 
            
                35,300
             |  
            
                 
             |                                                              
             
    
         
    
    
 |