| 
                 
                    Closing price on 6/10/2019
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    24.70 | 
                 
                
                    | High | 
                    25.20 | 
                 
                
                    | Low | 
                    24.50 | 
                     
                
                    | Volume | 
                    35,700 | 
                                 
                
                    | Split-adjusted Price | 
                    17.43 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
NRC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/10/2019
             | 
            
                -0.30 / -1.19%
             |             
            
                24.70
             |           
            
                25.20
             |               
            
                24.50
             |                           
            
                24.90
             | 
            
                24.73
             |                     
            
                17.43
             |                                 
            
                35,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/7/2019
             | 
            
                +0.60 / +2.44%
             |             
            
                24.50
             |           
            
                25.20
             |               
            
                24.50
             |                           
            
                25.20
             | 
            
                24.85
             |                     
            
                17.64
             |                                 
            
                33,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/6/2019
             | 
            
                0.00 / 0.00%
             |             
            
                24.60
             |           
            
                24.60
             |               
            
                24.60
             |                           
            
                24.60
             | 
            
                24.60
             |                     
            
                17.22
             |                                 
            
                500
             |            
            
                 
             |                                       
         
    
        
            | 
                6/5/2019
             | 
            
                0.00 / 0.00%
             |             
            
                24.60
             |           
            
                24.80
             |               
            
                24.60
             |                           
            
                24.60
             | 
            
                24.61
             |                     
            
                17.22
             |                                 
            
                2,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/4/2019
             | 
            
                -0.20 / -0.81%
             |             
            
                24.60
             |           
            
                24.80
             |               
            
                24.30
             |                           
            
                24.60
             | 
            
                24.49
             |                     
            
                17.22
             |                                 
            
                6,800
             |            
            
                 
             |                                       
         
    
        
            | 
                6/3/2019
             | 
            
                0.00 / 0.00%
             |             
            
                24.60
             |           
            
                25.00
             |               
            
                24.60
             |                           
            
                24.80
             | 
            
                24.94
             |                     
            
                17.36
             |                                 
            
                3,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/31/2019
             | 
            
                -0.90 / -3.50%
             |             
            
                25.70
             |           
            
                25.70
             |               
            
                24.80
             |                           
            
                24.80
             | 
            
                25.13
             |                     
            
                17.36
             |                                 
            
                12,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2019
             | 
            
                -0.30 / -1.15%
             |             
            
                25.80
             |           
            
                26.00
             |               
            
                25.60
             |                           
            
                25.70
             | 
            
                25.77
             |                     
            
                17.99
             |                                 
            
                23,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/29/2019
             | 
            
                -0.10 / -0.38%
             |             
            
                26.10
             |           
            
                26.20
             |               
            
                25.70
             |                           
            
                26.00
             | 
            
                25.99
             |                     
            
                18.20
             |                                 
            
                22,600
             |            
            
                 
             |                                       
         
    
        
            | 
                5/28/2019
             | 
            
                0.00 / 0.00%
             |             
            
                26.00
             |           
            
                26.30
             |               
            
                26.00
             |                           
            
                26.10
             | 
            
                26.10
             |                     
            
                18.27
             |                                 
            
                22,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/27/2019
             | 
            
                0.00 / 0.00%
             |             
            
                26.10
             |           
            
                26.70
             |               
            
                25.80
             |                           
            
                26.10
             | 
            
                26.19
             |                     
            
                18.27
             |                                 
            
                93,300
             |            
            
                 
             |                                       
         
    
        
            | 
                5/24/2019
             | 
            
                -0.20 / -0.76%
             |             
            
                26.20
             |           
            
                26.30
             |               
            
                25.90
             |                           
            
                26.10
             | 
            
                26.18
             |                     
            
                18.27
             |                                 
            
                65,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2019
             | 
            
                +0.20 / +0.77%
             |             
            
                25.70
             |           
            
                26.30
             |               
            
                25.70
             |                           
            
                26.30
             | 
            
                26.16
             |                     
            
                18.41
             |                                 
            
                70,700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2019
             | 
            
                0.00 / 0.00%
             |             
            
                25.60
             |           
            
                26.20
             |               
            
                25.60
             |                           
            
                26.10
             | 
            
                26.01
             |                     
            
                18.27
             |                                 
            
                57,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/21/2019
             | 
            
                +0.10 / +0.38%
             |             
            
                25.50
             |           
            
                26.20
             |               
            
                25.50
             |                           
            
                26.10
             | 
            
                25.96
             |                     
            
                18.27
             |                                 
            
                70,800
             |            
            
                 
             |                                       
         
    
        
            | 
                5/20/2019
             | 
            
                0.00 / 0.00%
             |             
            
                25.50
             |           
            
                26.30
             |               
            
                25.50
             |                           
            
                26.00
             | 
            
                26.00
             |                     
            
                18.20
             |                                 
            
                58,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/17/2019
             | 
            
                +0.40 / +1.56%
             |             
            
                25.20
             |           
            
                27.50
             |               
            
                25.20
             |                           
            
                26.00
             | 
            
                25.85
             |                     
            
                18.20
             |                                 
            
                69,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/16/2019
             | 
            
                +0.60 / +2.40%
             |             
            
                24.60
             |           
            
                25.60
             |               
            
                24.60
             |                           
            
                25.60
             | 
            
                25.40
             |                     
            
                17.92
             |                                 
            
                106,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/15/2019
             | 
            
                +0.20 / +0.81%
             |             
            
                24.40
             |           
            
                25.00
             |               
            
                24.40
             |                           
            
                25.00
             | 
            
                24.77
             |                     
            
                17.50
             |                                 
            
                19,700
             |            
            
                 
             |                                       
         
    
        
            | 
                5/14/2019
             | 
            
                -0.20 / -0.80%
             |             
            
                24.60
             |           
            
                25.10
             |               
            
                24.30
             |                           
            
                24.80
             | 
            
                24.70
             |                     
            
                17.36
             |                                 
            
                17,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/13/2019
             | 
            
                -0.30 / -1.19%
             |             
            
                24.50
             |           
            
                25.20
             |               
            
                24.40
             |                           
            
                25.00
             | 
            
                24.74
             |                     
            
                17.50
             |                                 
            
                23,800
             |            
            
                 
             |                                       
         
    
        
            | 
                5/10/2019
             | 
            
                -0.10 / -0.39%
             |             
            
                25.20
             |           
            
                25.50
             |               
            
                24.30
             |                           
            
                25.30
             | 
            
                24.87
             |                     
            
                17.71
             |                                 
            
                42,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/9/2019
             | 
            
                0.00 / 0.00%
             |             
            
                25.50
             |           
            
                25.60
             |               
            
                25.00
             |                           
            
                25.40
             | 
            
                25.30
             |                     
            
                17.78
             |                                 
            
                8,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2019
             | 
            
                +0.10 / +0.40%
             |             
            
                26.00
             |           
            
                26.00
             |               
            
                24.90
             |                           
            
                25.40
             | 
            
                25.15
             |                     
            
                17.78
             |                                 
            
                20,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/7/2019
             | 
            
                +0.40 / +1.61%
             |             
            
                24.80
             |           
            
                25.80
             |               
            
                24.80
             |                           
            
                25.30
             | 
            
                25.13
             |                     
            
                17.71
             |                                 
            
                40,000
             |            
            
                 
             |                                       
         
    
        
            | 
                5/6/2019
             | 
            
                +0.10 / +0.40%
             |             
            
                25.10
             |           
            
                25.10
             |               
            
                24.60
             |                           
            
                24.90
             | 
            
                24.81
             |                     
            
                17.43
             |                                 
            
                23,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/3/2019
             | 
            
                +0.20 / +0.81%
             |             
            
                24.70
             |           
            
                24.90
             |               
            
                24.70
             |                           
            
                24.80
             | 
            
                24.80
             |                     
            
                17.36
             |                                 
            
                17,400
             |            
            
                 
             |                                       
         
    
        
            | 
                5/2/2019
             | 
            
                -0.10 / -0.40%
             |             
            
                24.90
             |           
            
                24.90
             |               
            
                24.50
             |                           
            
                24.60
             | 
            
                24.60
             |                     
            
                17.22
             |                                 
            
                17,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/26/2019
             | 
            
                0.00 / 0.00%
             |             
            
                24.80
             |           
            
                24.80
             |               
            
                24.70
             |                           
            
                24.70
             | 
            
                24.73
             |                     
            
                17.29
             |                                 
            
                13,700
             |            
            
                 
             |                                       
         
    
        
            | 
                4/25/2019
             | 
            
                0.00 / 0.00%
             |             
            
                24.50
             |           
            
                24.80
             |               
            
                24.50
             |                           
            
                24.70
             | 
            
                24.67
             |                     
            
                17.29
             |                                 
            
                24,600
             |  
            
                 
             |                                                              
             
    
         
    
    
 |