| 
                 
                    Closing price on 4/6/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    31.10 | 
                 
                
                    | High | 
                    31.10 | 
                 
                
                    | Low | 
                    31.00 | 
                     
                
                    | Volume | 
                    4,400 | 
                                 
                
                    | Split-adjusted Price | 
                    19.84 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PGS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/6/2018
             | 
            
                0.00 / 0.00%
             |             
            
                31.10
             |           
            
                31.10
             |               
            
                31.00
             |                           
            
                31.00
             | 
            
                31.01
             |                     
            
                19.84
             |                                 
            
                4,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/5/2018
             | 
            
                -0.80 / -2.52%
             |             
            
                33.00
             |           
            
                33.00
             |               
            
                31.00
             |                           
            
                31.00
             | 
            
                31.33
             |                     
            
                19.84
             |                                 
            
                668
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2018
             | 
            
                +0.20 / +0.63%
             |             
            
                29.20
             |           
            
                32.50
             |               
            
                29.20
             |                           
            
                31.80
             | 
            
                31.42
             |                     
            
                20.35
             |                                 
            
                46,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2018
             | 
            
                0.00 / 0.00%
             |             
            
                31.60
             |           
            
                31.60
             |               
            
                31.60
             |                           
            
                31.60
             | 
            
                31.60
             |                     
            
                20.22
             |                                 
            
                0
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/2/2018
             | 
            
                -0.40 / -1.25%
             |             
            
                31.50
             |           
            
                31.60
             |               
            
                31.50
             |                           
            
                31.60
             | 
            
                31.53
             |                     
            
                20.22
             |                                 
            
                300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2018
             | 
            
                -1.00 / -3.03%
             |             
            
                32.00
             |           
            
                32.00
             |               
            
                32.00
             |                           
            
                32.00
             | 
            
                32.00
             |                     
            
                20.48
             |                                 
            
                1,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/29/2018
             | 
            
                +2.00 / +6.45%
             |             
            
                33.00
             |           
            
                33.00
             |               
            
                33.00
             |                           
            
                33.00
             | 
            
                33.00
             |                     
            
                21.12
             |                                 
            
                130
             |            
            
                 
             |                                       
         
    
        
            | 
                3/28/2018
             | 
            
                -2.00 / -6.06%
             |             
            
                30.00
             |           
            
                33.10
             |               
            
                29.70
             |                           
            
                31.00
             | 
            
                31.39
             |                     
            
                19.84
             |                                 
            
                149,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/27/2018
             | 
            
                0.00 / 0.00%
             |             
            
                32.00
             |           
            
                33.20
             |               
            
                32.00
             |                           
            
                33.00
             | 
            
                33.00
             |                     
            
                21.12
             |                                 
            
                264,400
             |            
            
                 
             |                                       
         
    
        
            | 
                3/26/2018
             | 
            
                -0.50 / -1.49%
             |             
            
                32.00
             |           
            
                34.00
             |               
            
                32.00
             |                           
            
                33.00
             | 
            
                33.01
             |                     
            
                21.12
             |                                 
            
                4,708
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/23/2018
             | 
            
                0.00 / 0.00%
             |             
            
                33.30
             |           
            
                33.50
             |               
            
                32.50
             |                           
            
                33.50
             | 
            
                33.04
             |                     
            
                21.44
             |                                 
            
                16,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/22/2018
             | 
            
                0.00 / 0.00%
             |             
            
                33.50
             |           
            
                33.50
             |               
            
                30.30
             |                           
            
                33.50
             | 
            
                32.62
             |                     
            
                21.44
             |                                 
            
                16,269
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/21/2018
             | 
            
                +0.30 / +0.90%
             |             
            
                33.20
             |           
            
                33.50
             |               
            
                33.20
             |                           
            
                33.50
             | 
            
                33.43
             |                     
            
                21.44
             |                                 
            
                42,322
             |            
            
                 
             |                                       
         
    
        
            | 
                3/20/2018
             | 
            
                +0.20 / +0.61%
             |             
            
                33.00
             |           
            
                33.50
             |               
            
                33.00
             |                           
            
                33.20
             | 
            
                33.31
             |                     
            
                21.24
             |                                 
            
                15,973
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/19/2018
             | 
            
                0.00 / 0.00%
             |             
            
                33.00
             |           
            
                33.40
             |               
            
                32.80
             |                           
            
                33.00
             | 
            
                33.08
             |                     
            
                21.12
             |                                 
            
                17,600
             |            
            
                 
             |                                       
         
    
        
            | 
                3/16/2018
             | 
            
                +0.70 / +2.17%
             |             
            
                32.30
             |           
            
                33.00
             |               
            
                32.00
             |                           
            
                33.00
             | 
            
                32.77
             |                     
            
                21.12
             |                                 
            
                26,539
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/15/2018
             | 
            
                +0.30 / +0.94%
             |             
            
                31.00
             |           
            
                32.30
             |               
            
                31.00
             |                           
            
                32.30
             | 
            
                32.17
             |                     
            
                20.67
             |                                 
            
                2,364
             |            
            
                 
             |                                       
         
    
        
            | 
                3/14/2018
             | 
            
                +0.50 / +1.59%
             |             
            
                32.00
             |           
            
                32.00
             |               
            
                32.00
             |                           
            
                32.00
             | 
            
                32.00
             |                     
            
                20.48
             |                                 
            
                30,683
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/13/2018
             | 
            
                -1.00 / -3.08%
             |             
            
                32.50
             |           
            
                32.50
             |               
            
                31.00
             |                           
            
                31.50
             | 
            
                31.77
             |                     
            
                20.16
             |                                 
            
                11,339
             |            
            
                 
             |                                       
         
    
        
            | 
                3/12/2018
             | 
            
                +0.50 / +1.56%
             |             
            
                32.00
             |           
            
                32.50
             |               
            
                31.50
             |                           
            
                32.50
             | 
            
                31.85
             |                     
            
                20.80
             |                                 
            
                15,640
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/9/2018
             | 
            
                +0.50 / +1.59%
             |             
            
                32.00
             |           
            
                32.00
             |               
            
                32.00
             |                           
            
                32.00
             | 
            
                32.00
             |                     
            
                20.48
             |                                 
            
                2,868
             |            
            
                 
             |                                       
         
    
        
            | 
                3/8/2018
             | 
            
                +0.50 / +1.61%
             |             
            
                31.50
             |           
            
                31.50
             |               
            
                31.50
             |                           
            
                31.50
             | 
            
                31.50
             |                     
            
                20.16
             |                                 
            
                2,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/7/2018
             | 
            
                0.00 / 0.00%
             |             
            
                31.00
             |           
            
                31.00
             |               
            
                31.00
             |                           
            
                31.00
             | 
            
                31.00
             |                     
            
                19.84
             |                                 
            
                110,500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/6/2018
             | 
            
                -3.00 / -8.82%
             |             
            
                31.00
             |           
            
                33.00
             |               
            
                31.00
             |                           
            
                31.00
             | 
            
                31.01
             |                     
            
                19.84
             |                                 
            
                25,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/5/2018
             | 
            
                +0.50 / +1.49%
             |             
            
                32.00
             |           
            
                34.00
             |               
            
                30.30
             |                           
            
                34.00
             | 
            
                31.06
             |                     
            
                21.76
             |                                 
            
                6,936
             |            
            
                 
             |                                       
         
    
        
            | 
                3/2/2018
             | 
            
                +0.50 / +1.52%
             |             
            
                33.00
             |           
            
                33.50
             |               
            
                33.00
             |                           
            
                33.50
             | 
            
                33.08
             |                     
            
                21.44
             |                                 
            
                9,403
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/1/2018
             | 
            
                +0.70 / +2.17%
             |             
            
                32.30
             |           
            
                34.00
             |               
            
                32.20
             |                           
            
                33.00
             | 
            
                32.35
             |                     
            
                21.12
             |                                 
            
                17,483
             |            
            
                 
             |                                       
         
    
        
            | 
                2/28/2018
             | 
            
                -0.20 / -0.62%
             |             
            
                32.00
             |           
            
                34.00
             |               
            
                32.00
             |                           
            
                32.30
             | 
            
                32.78
             |                     
            
                20.67
             |                                 
            
                3,129
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/27/2018
             | 
            
                +1.00 / +3.17%
             |             
            
                32.50
             |           
            
                32.50
             |               
            
                32.50
             |                           
            
                32.50
             | 
            
                32.50
             |                     
            
                20.80
             |                                 
            
                815
             |            
            
                 
             |                                       
         
    
        
            | 
                2/26/2018
             | 
            
                -2.50 / -7.35%
             |             
            
                33.00
             |           
            
                33.00
             |               
            
                31.00
             |                           
            
                31.50
             | 
            
                31.10
             |                     
            
                20.16
             |                                 
            
                52,996
             |  
            
                 
             |                                                              
             
    
         
    
    
 |