| 
                 
                    Closing price on 10/25/2017
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    23.20 | 
                 
                
                    | High | 
                    23.20 | 
                 
                
                    | Low | 
                    23.20 | 
                     
                
                    | Volume | 
                    10 | 
                                 
                
                    | Split-adjusted Price | 
                    14.85 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PGS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                10/25/2017
             | 
            
                0.00 / 0.00%
             |             
            
                23.20
             |           
            
                23.20
             |               
            
                23.20
             |                           
            
                23.20
             | 
            
                23.20
             |                     
            
                14.85
             |                                 
            
                10
             |            
            
                 
             |                                       
         
    
        
            | 
                10/24/2017
             | 
            
                -0.60 / -2.52%
             |             
            
                23.30
             |           
            
                23.30
             |               
            
                22.20
             |                           
            
                23.20
             | 
            
                22.59
             |                     
            
                14.85
             |                                 
            
                28,799
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/23/2017
             | 
            
                -0.20 / -0.83%
             |             
            
                24.00
             |           
            
                24.20
             |               
            
                23.60
             |                           
            
                23.80
             | 
            
                23.88
             |                     
            
                14.59
             |                                 
            
                4,100
             |            
            
                 
             |                                       
         
    
        
            | 
                10/20/2017
             | 
            
                -0.20 / -0.83%
             |             
            
                24.10
             |           
            
                24.50
             |               
            
                24.00
             |                           
            
                24.00
             | 
            
                24.45
             |                     
            
                14.71
             |                                 
            
                78,347
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/19/2017
             | 
            
                +0.40 / +1.68%
             |             
            
                24.40
             |           
            
                24.40
             |               
            
                23.70
             |                           
            
                24.20
             | 
            
                24.00
             |                     
            
                14.84
             |                                 
            
                15,910
             |            
            
                 
             |                                       
         
    
        
            | 
                10/18/2017
             | 
            
                -0.70 / -2.86%
             |             
            
                24.50
             |           
            
                24.50
             |               
            
                23.80
             |                           
            
                23.80
             | 
            
                23.96
             |                     
            
                14.59
             |                                 
            
                10,867
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/17/2017
             | 
            
                +0.50 / +2.08%
             |             
            
                24.50
             |           
            
                24.60
             |               
            
                24.00
             |                           
            
                24.50
             | 
            
                24.44
             |                     
            
                15.02
             |                                 
            
                39,355
             |            
            
                 
             |                                       
         
    
        
            | 
                10/16/2017
             | 
            
                +0.40 / +1.69%
             |             
            
                23.40
             |           
            
                24.30
             |               
            
                23.40
             |                           
            
                24.00
             | 
            
                23.83
             |                     
            
                14.71
             |                                 
            
                38,362
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/13/2017
             | 
            
                -0.70 / -2.88%
             |             
            
                23.90
             |           
            
                24.10
             |               
            
                23.10
             |                           
            
                23.60
             | 
            
                23.49
             |                     
            
                14.47
             |                                 
            
                9,686
             |            
            
                 
             |                                       
         
    
        
            | 
                10/12/2017
             | 
            
                0.00 / 0.00%
             |             
            
                24.10
             |           
            
                24.30
             |               
            
                24.10
             |                           
            
                24.30
             | 
            
                24.20
             |                     
            
                14.90
             |                                 
            
                1,377
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/11/2017
             | 
            
                -0.30 / -1.22%
             |             
            
                24.60
             |           
            
                24.60
             |               
            
                23.30
             |                           
            
                24.30
             | 
            
                24.04
             |                     
            
                14.90
             |                                 
            
                21,630
             |            
            
                 
             |                                       
         
    
        
            | 
                10/10/2017
             | 
            
                +0.60 / +2.50%
             |             
            
                24.00
             |           
            
                24.60
             |               
            
                23.90
             |                           
            
                24.60
             | 
            
                24.25
             |                     
            
                15.08
             |                                 
            
                191,966
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/9/2017
             | 
            
                +0.40 / +1.69%
             |             
            
                23.70
             |           
            
                24.00
             |               
            
                23.00
             |                           
            
                24.00
             | 
            
                23.80
             |                     
            
                14.71
             |                                 
            
                220,010
             |            
            
                 
             |                                       
         
    
        
            | 
                10/6/2017
             | 
            
                +0.10 / +0.43%
             |             
            
                23.10
             |           
            
                23.60
             |               
            
                23.10
             |                           
            
                23.60
             | 
            
                23.42
             |                     
            
                14.47
             |                                 
            
                51,815
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/5/2017
             | 
            
                0.00 / 0.00%
             |             
            
                22.90
             |           
            
                23.50
             |               
            
                22.90
             |                           
            
                23.50
             | 
            
                23.17
             |                     
            
                14.41
             |                                 
            
                102,500
             |            
            
                 
             |                                       
         
    
        
            | 
                10/4/2017
             | 
            
                +0.50 / +2.17%
             |             
            
                22.90
             |           
            
                23.90
             |               
            
                22.90
             |                           
            
                23.50
             | 
            
                23.43
             |                     
            
                14.41
             |                                 
            
                1,753
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/3/2017
             | 
            
                0.00 / 0.00%
             |             
            
                22.50
             |           
            
                23.30
             |               
            
                22.00
             |                           
            
                23.00
             | 
            
                22.59
             |                     
            
                14.10
             |                                 
            
                13,156
             |            
            
                 
             |                                       
         
    
        
            | 
                10/2/2017
             | 
            
                -0.30 / -1.29%
             |             
            
                22.70
             |           
            
                23.10
             |               
            
                22.60
             |                           
            
                23.00
             | 
            
                22.74
             |                     
            
                14.10
             |                                 
            
                16,756
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/29/2017
             | 
            
                -0.10 / -0.43%
             |             
            
                22.90
             |           
            
                23.40
             |               
            
                22.70
             |                           
            
                23.30
             | 
            
                22.72
             |                     
            
                14.28
             |                                 
            
                30,000
             |            
            
                 
             |                                       
         
    
        
            | 
                9/28/2017
             | 
            
                +1.00 / +4.46%
             |             
            
                22.00
             |           
            
                23.60
             |               
            
                22.00
             |                           
            
                23.40
             | 
            
                23.35
             |                     
            
                14.34
             |                                 
            
                134,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/27/2017
             | 
            
                -0.60 / -2.61%
             |             
            
                22.20
             |           
            
                23.00
             |               
            
                22.00
             |                           
            
                22.40
             | 
            
                22.68
             |                     
            
                13.73
             |                                 
            
                37,941
             |            
            
                 
             |                                       
         
    
        
            | 
                9/26/2017
             | 
            
                -0.40 / -1.71%
             |             
            
                23.50
             |           
            
                23.50
             |               
            
                22.60
             |                           
            
                23.00
             | 
            
                23.20
             |                     
            
                14.10
             |                                 
            
                5,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/25/2017
             | 
            
                -0.20 / -0.85%
             |             
            
                22.80
             |           
            
                23.40
             |               
            
                22.80
             |                           
            
                23.40
             | 
            
                22.97
             |                     
            
                14.34
             |                                 
            
                5,000
             |            
            
                 
             |                                       
         
    
        
            | 
                9/22/2017
             | 
            
                +0.20 / +0.85%
             |             
            
                22.70
             |           
            
                24.00
             |               
            
                22.70
             |                           
            
                23.60
             | 
            
                23.58
             |                     
            
                14.47
             |                                 
            
                63,059
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/21/2017
             | 
            
                0.00 / 0.00%
             |             
            
                23.40
             |           
            
                23.40
             |               
            
                23.20
             |                           
            
                23.40
             | 
            
                23.39
             |                     
            
                14.34
             |                                 
            
                11,804
             |            
            
                 
             |                                       
         
    
        
            | 
                9/20/2017
             | 
            
                +0.60 / +2.63%
             |             
            
                22.80
             |           
            
                24.00
             |               
            
                22.00
             |                           
            
                23.40
             | 
            
                23.57
             |                     
            
                14.34
             |                                 
            
                396,149
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/19/2017
             | 
            
                -0.30 / -1.30%
             |             
            
                22.70
             |           
            
                23.50
             |               
            
                22.70
             |                           
            
                22.80
             | 
            
                23.03
             |                     
            
                13.98
             |                                 
            
                5,606
             |            
            
                 
             |                                       
         
    
        
            | 
                9/18/2017
             | 
            
                0.00 / 0.00%
             |             
            
                24.50
             |           
            
                24.50
             |               
            
                22.50
             |                           
            
                23.10
             | 
            
                23.16
             |                     
            
                14.16
             |                                 
            
                74,806
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/15/2017
             | 
            
                +2.10 / +10.00%
             |             
            
                22.00
             |           
            
                23.10
             |               
            
                22.00
             |                           
            
                23.10
             | 
            
                22.81
             |                     
            
                14.16
             |                                 
            
                230,074
             |            
            
                 
             |                                       
         
    
        
            | 
                9/14/2017
             | 
            
                -1.20 / -5.41%
             |             
            
                22.20
             |           
            
                22.80
             |               
            
                20.80
             |                           
            
                21.00
             | 
            
                21.98
             |                     
            
                12.87
             |                                 
            
                119,755
             |  
            
                 
             |                                                              
             
    
         
    
    
 |