| 
                 
                    Closing price on 2/6/2018
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    33.50 | 
                 
                
                    | High | 
                    35.50 | 
                 
                
                    | Low | 
                    32.00 | 
                     
                
                    | Volume | 
                    210,625 | 
                                 
                
                    | Split-adjusted Price | 
                    22.27 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PGS Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                2/6/2018
             | 
            
                -0.70 / -1.97%
             |             
            
                33.50
             |           
            
                35.50
             |               
            
                32.00
             |                           
            
                34.80
             | 
            
                32.49
             |                     
            
                22.27
             |                                 
            
                210,625
             |            
            
                 
             |                                       
         
    
        
            | 
                2/5/2018
             | 
            
                +1.50 / +4.41%
             |             
            
                34.00
             |           
            
                35.50
             |               
            
                33.00
             |                           
            
                35.50
             | 
            
                34.30
             |                     
            
                22.72
             |                                 
            
                47,758
             |  
            
                 
             |                                                              
             
    
        			
            | 
                2/2/2018
             | 
            
                -2.70 / -7.36%
             |             
            
                36.00
             |           
            
                36.00
             |               
            
                34.00
             |                           
            
                34.00
             | 
            
                35.83
             |                     
            
                21.76
             |                                 
            
                13,867
             |            
            
                 
             |                                       
         
    
        
            | 
                2/1/2018
             | 
            
                -0.30 / -0.81%
             |             
            
                37.00
             |           
            
                37.00
             |               
            
                36.00
             |                           
            
                36.70
             | 
            
                36.24
             |                     
            
                23.48
             |                                 
            
                15,919
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/31/2018
             | 
            
                +1.40 / +3.93%
             |             
            
                35.50
             |           
            
                37.00
             |               
            
                35.50
             |                           
            
                37.00
             | 
            
                36.40
             |                     
            
                23.68
             |                                 
            
                223,022
             |            
            
                 
             |                                       
         
    
        
            | 
                1/30/2018
             | 
            
                +1.60 / +4.71%
             |             
            
                32.60
             |           
            
                35.60
             |               
            
                31.90
             |                           
            
                35.60
             | 
            
                35.02
             |                     
            
                22.78
             |                                 
            
                246,182
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/29/2018
             | 
            
                -0.80 / -2.30%
             |             
            
                32.00
             |           
            
                34.40
             |               
            
                31.50
             |                           
            
                34.00
             | 
            
                31.54
             |                     
            
                21.76
             |                                 
            
                30,677
             |            
            
                 
             |                                       
         
    
        
            | 
                1/26/2018
             | 
            
                +0.10 / +0.29%
             |             
            
                34.50
             |           
            
                34.80
             |               
            
                34.00
             |                           
            
                34.80
             | 
            
                34.51
             |                     
            
                22.27
             |                                 
            
                40,837
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/25/2018
             | 
            
                +1.20 / +3.58%
             |             
            
                33.50
             |           
            
                35.00
             |               
            
                33.50
             |                           
            
                34.70
             | 
            
                34.03
             |                     
            
                22.20
             |                                 
            
                108,326
             |            
            
                 
             |                                       
         
    
        
            | 
                1/24/2018
             | 
            
                +0.10 / +0.30%
             |             
            
                36.60
             |           
            
                36.70
             |               
            
                33.50
             |                           
            
                33.50
             | 
            
                35.07
             |                     
            
                21.44
             |                                 
            
                71,914
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/23/2018
             | 
            
                +3.00 / +9.87%
             |             
            
                30.00
             |           
            
                33.40
             |               
            
                30.00
             |                           
            
                33.40
             | 
            
                33.39
             |                     
            
                21.37
             |                                 
            
                264,496
             |            
            
                 
             |                                       
         
    
        
            | 
                1/22/2018
             | 
            
                +2.70 / +9.75%
             |             
            
                28.00
             |           
            
                30.40
             |               
            
                28.00
             |                           
            
                30.40
             | 
            
                30.12
             |                     
            
                19.45
             |                                 
            
                183,608
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/19/2018
             | 
            
                -0.10 / -0.36%
             |             
            
                27.70
             |           
            
                28.50
             |               
            
                27.70
             |                           
            
                27.70
             | 
            
                28.18
             |                     
            
                17.73
             |                                 
            
                21,319
             |            
            
                 
             |                                       
         
    
        
            | 
                1/18/2018
             | 
            
                +0.30 / +1.09%
             |             
            
                26.00
             |           
            
                27.90
             |               
            
                26.00
             |                           
            
                27.80
             | 
            
                26.66
             |                     
            
                17.79
             |                                 
            
                3,138
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/17/2018
             | 
            
                -1.00 / -3.51%
             |             
            
                28.50
             |           
            
                28.50
             |               
            
                27.50
             |                           
            
                27.50
             | 
            
                27.53
             |                     
            
                17.60
             |                                 
            
                107,580
             |            
            
                 
             |                                       
         
    
        
            | 
                1/16/2018
             | 
            
                +0.50 / +1.79%
             |             
            
                28.20
             |           
            
                28.50
             |               
            
                28.10
             |                           
            
                28.50
             | 
            
                28.33
             |                     
            
                18.24
             |                                 
            
                23,467
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/15/2018
             | 
            
                0.00 / 0.00%
             |             
            
                26.50
             |           
            
                28.00
             |               
            
                26.50
             |                           
            
                28.00
             | 
            
                27.89
             |                     
            
                17.92
             |                                 
            
                11,109
             |            
            
                 
             |                                       
         
    
        
            | 
                1/12/2018
             | 
            
                +0.50 / +1.82%
             |             
            
                27.50
             |           
            
                28.50
             |               
            
                27.50
             |                           
            
                28.00
             | 
            
                27.76
             |                     
            
                17.92
             |                                 
            
                80,531
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/11/2018
             | 
            
                0.00 / 0.00%
             |             
            
                27.50
             |           
            
                27.80
             |               
            
                27.40
             |                           
            
                27.50
             | 
            
                27.54
             |                     
            
                17.60
             |                                 
            
                354,801
             |            
            
                 
             |                                       
         
    
        
            | 
                1/10/2018
             | 
            
                -0.50 / -1.79%
             |             
            
                27.00
             |           
            
                27.50
             |               
            
                27.00
             |                           
            
                27.50
             | 
            
                27.37
             |                     
            
                17.60
             |                                 
            
                26,683
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/9/2018
             | 
            
                +0.50 / +1.82%
             |             
            
                27.00
             |           
            
                28.00
             |               
            
                26.20
             |                           
            
                28.00
             | 
            
                27.39
             |                     
            
                17.92
             |                                 
            
                55,231
             |            
            
                 
             |                                       
         
    
        
            | 
                1/8/2018
             | 
            
                +2.50 / +10.00%
             |             
            
                25.10
             |           
            
                27.50
             |               
            
                24.50
             |                           
            
                27.50
             | 
            
                27.30
             |                     
            
                17.60
             |                                 
            
                109,150
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/5/2018
             | 
            
                -0.40 / -1.57%
             |             
            
                24.60
             |           
            
                25.00
             |               
            
                24.60
             |                           
            
                25.00
             | 
            
                24.83
             |                     
            
                16.00
             |                                 
            
                663
             |            
            
                 
             |                                       
         
    
        
            | 
                1/4/2018
             | 
            
                +0.20 / +0.79%
             |             
            
                25.00
             |           
            
                25.40
             |               
            
                24.60
             |                           
            
                25.40
             | 
            
                25.30
             |                     
            
                16.25
             |                                 
            
                27,260
             |  
            
                 
             |                                                              
             
    
        			
            | 
                1/3/2018
             | 
            
                +0.20 / +0.80%
             |             
            
                25.00
             |           
            
                25.20
             |               
            
                25.00
             |                           
            
                25.20
             | 
            
                25.01
             |                     
            
                16.13
             |                                 
            
                15,347
             |            
            
                 
             |                                       
         
    
        
            | 
                1/2/2018
             | 
            
                0.00 / 0.00%
             |             
            
                25.00
             |           
            
                25.10
             |               
            
                25.00
             |                           
            
                25.00
             | 
            
                25.01
             |                     
            
                16.00
             |                                 
            
                58,250
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/29/2017
             | 
            
                -0.20 / -0.79%
             |             
            
                25.00
             |           
            
                25.20
             |               
            
                25.00
             |                           
            
                25.00
             | 
            
                25.14
             |                     
            
                16.00
             |                                 
            
                18,103
             |            
            
                 
             |                                       
         
    
        
            | 
                12/28/2017
             | 
            
                -0.20 / -0.79%
             |             
            
                25.40
             |           
            
                25.40
             |               
            
                25.00
             |                           
            
                25.20
             | 
            
                25.22
             |                     
            
                16.13
             |                                 
            
                54,480
             |  
            
                 
             |                                                              
             
    
        			
            | 
                12/27/2017
             | 
            
                -0.10 / -0.39%
             |             
            
                24.60
             |           
            
                25.40
             |               
            
                24.60
             |                           
            
                25.40
             | 
            
                25.25
             |                     
            
                16.25
             |                                 
            
                1,930
             |            
            
                 
             |                                       
         
    
        
            | 
                12/26/2017
             | 
            
                +0.50 / +2.00%
             |             
            
                25.10
             |           
            
                25.50
             |               
            
                24.00
             |                           
            
                25.50
             | 
            
                24.93
             |                     
            
                16.32
             |                                 
            
                16,830
             |  
            
                 
             |                                                              
             
    
         
    
    
 |