| 
                 
                    Closing price on 5/9/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    13.40 | 
                 
                
                    | High | 
                    14.40 | 
                 
                
                    | Low | 
                    13.20 | 
                     
                
                    | Volume | 
                    530,100 | 
                                 
                
                    | Split-adjusted Price | 
                    8.76 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
PVE Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                5/9/2012
             | 
            
                +1.10 / +8.27%
             |             
            
                13.40
             |           
            
                14.40
             |               
            
                13.20
             |                           
            
                14.40
             | 
            
                14.40
             |                     
            
                8.76
             |                                 
            
                530,100
             |            
            
                 
             |                                       
         
    
        
            | 
                5/8/2012
             | 
            
                -1.00 / -6.99%
             |             
            
                14.50
             |           
            
                14.80
             |               
            
                13.30
             |                           
            
                13.30
             | 
            
                13.30
             |                     
            
                8.09
             |                                 
            
                451,950
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/7/2012
             | 
            
                +1.00 / +7.52%
             |             
            
                13.90
             |           
            
                14.30
             |               
            
                13.80
             |                           
            
                14.30
             | 
            
                14.30
             |                     
            
                8.70
             |                                 
            
                699,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/4/2012
             | 
            
                +0.50 / +3.91%
             |             
            
                13.10
             |           
            
                13.70
             |               
            
                13.10
             |                           
            
                13.30
             | 
            
                13.30
             |                     
            
                8.09
             |                                 
            
                371,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/3/2012
             | 
            
                -0.10 / -0.78%
             |             
            
                13.00
             |           
            
                13.20
             |               
            
                12.70
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                7.78
             |                                 
            
                148,200
             |            
            
                 
             |                                       
         
    
        
            | 
                5/2/2012
             | 
            
                +0.10 / +0.78%
             |             
            
                13.60
             |           
            
                13.60
             |               
            
                12.90
             |                           
            
                12.90
             | 
            
                12.90
             |                     
            
                7.84
             |                                 
            
                399,495
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/27/2012
             | 
            
                +0.70 / +5.79%
             |             
            
                12.20
             |           
            
                12.80
             |               
            
                12.20
             |                           
            
                12.80
             | 
            
                12.80
             |                     
            
                7.78
             |                                 
            
                640,750
             |            
            
                 
             |                                       
         
    
        
            | 
                4/26/2012
             | 
            
                -0.10 / -0.82%
             |             
            
                12.10
             |           
            
                12.20
             |               
            
                11.90
             |                           
            
                12.10
             | 
            
                12.10
             |                     
            
                7.36
             |                                 
            
                74,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/25/2012
             | 
            
                +0.20 / +1.67%
             |             
            
                12.00
             |           
            
                12.20
             |               
            
                12.00
             |                           
            
                12.20
             | 
            
                12.20
             |                     
            
                7.42
             |                                 
            
                201,250
             |            
            
                 
             |                                       
         
    
        
            | 
                4/24/2012
             | 
            
                +0.20 / +1.69%
             |             
            
                11.50
             |           
            
                12.00
             |               
            
                11.50
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                7.30
             |                                 
            
                93,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/23/2012
             | 
            
                -0.10 / -0.84%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                11.70
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                7.18
             |                                 
            
                128,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/20/2012
             | 
            
                0.00 / 0.00%
             |             
            
                11.90
             |           
            
                12.10
             |               
            
                11.60
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                7.24
             |                                 
            
                127,070
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/19/2012
             | 
            
                -0.50 / -4.03%
             |             
            
                12.40
             |           
            
                12.50
             |               
            
                11.80
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                7.24
             |                                 
            
                124,500
             |            
            
                 
             |                                       
         
    
        
            | 
                4/18/2012
             | 
            
                +0.10 / +0.81%
             |             
            
                12.30
             |           
            
                13.00
             |               
            
                12.30
             |                           
            
                12.40
             | 
            
                12.40
             |                     
            
                7.54
             |                                 
            
                137,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/17/2012
             | 
            
                -0.20 / -1.60%
             |             
            
                12.70
             |           
            
                13.00
             |               
            
                12.30
             |                           
            
                12.30
             | 
            
                12.30
             |                     
            
                7.48
             |                                 
            
                124,000
             |            
            
                 
             |                                       
         
    
        
            | 
                4/16/2012
             | 
            
                +0.90 / +7.76%
             |             
            
                12.00
             |           
            
                12.50
             |               
            
                11.70
             |                           
            
                12.50
             | 
            
                12.50
             |                     
            
                7.60
             |                                 
            
                411,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/13/2012
             | 
            
                0.00 / 0.00%
             |             
            
                11.70
             |           
            
                11.90
             |               
            
                11.60
             |                           
            
                11.60
             | 
            
                11.60
             |                     
            
                7.05
             |                                 
            
                85,950
             |            
            
                 
             |                                       
         
    
        
            | 
                4/12/2012
             | 
            
                -0.20 / -1.69%
             |             
            
                11.90
             |           
            
                12.10
             |               
            
                11.60
             |                           
            
                11.60
             | 
            
                11.60
             |                     
            
                7.05
             |                                 
            
                113,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/11/2012
             | 
            
                +0.20 / +1.72%
             |             
            
                11.50
             |           
            
                12.00
             |               
            
                11.50
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                7.18
             |                                 
            
                86,100
             |            
            
                 
             |                                       
         
    
        
            | 
                4/10/2012
             | 
            
                -0.20 / -1.69%
             |             
            
                11.90
             |           
            
                11.90
             |               
            
                11.50
             |                           
            
                11.60
             | 
            
                11.60
             |                     
            
                7.05
             |                                 
            
                101,450
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/9/2012
             | 
            
                +0.30 / +2.61%
             |             
            
                11.60
             |           
            
                11.90
             |               
            
                11.50
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                7.18
             |                                 
            
                77,250
             |            
            
                 
             |                                       
         
    
        
            | 
                4/6/2012
             | 
            
                -0.40 / -3.36%
             |             
            
                11.60
             |           
            
                11.80
             |               
            
                11.40
             |                           
            
                11.50
             | 
            
                11.50
             |                     
            
                6.99
             |                                 
            
                73,495
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/5/2012
             | 
            
                +0.60 / +5.31%
             |             
            
                11.30
             |           
            
                11.90
             |               
            
                11.20
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                7.24
             |                                 
            
                32,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/4/2012
             | 
            
                -0.50 / -4.24%
             |             
            
                11.80
             |           
            
                11.80
             |               
            
                11.30
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                6.87
             |                                 
            
                57,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/3/2012
             | 
            
                +0.70 / +6.31%
             |             
            
                11.30
             |           
            
                11.80
             |               
            
                11.30
             |                           
            
                11.80
             | 
            
                11.80
             |                     
            
                7.18
             |                                 
            
                66,500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/30/2012
             | 
            
                -0.20 / -1.77%
             |             
            
                11.30
             |           
            
                11.30
             |               
            
                11.00
             |                           
            
                11.10
             | 
            
                11.10
             |                     
            
                6.75
             |                                 
            
                104,225
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/29/2012
             | 
            
                -0.60 / -5.04%
             |             
            
                12.00
             |           
            
                12.10
             |               
            
                11.20
             |                           
            
                11.30
             | 
            
                11.30
             |                     
            
                6.87
             |                                 
            
                243,455
             |            
            
                 
             |                                       
         
    
        
            | 
                3/28/2012
             | 
            
                -0.10 / -0.83%
             |             
            
                12.00
             |           
            
                12.00
             |               
            
                11.60
             |                           
            
                11.90
             | 
            
                11.90
             |                     
            
                7.24
             |                                 
            
                34,650
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/27/2012
             | 
            
                -0.90 / -6.98%
             |             
            
                12.50
             |           
            
                12.80
             |               
            
                12.00
             |                           
            
                12.00
             | 
            
                12.00
             |                     
            
                7.30
             |                                 
            
                87,215
             |            
            
                 
             |                                       
         
    
        
            | 
                3/26/2012
             | 
            
                +0.40 / +3.20%
             |             
            
                12.90
             |           
            
                13.30
             |               
            
                12.70
             |                           
            
                12.90
             | 
            
                12.90
             |                     
            
                7.84
             |                                 
            
                271,700
             |  
            
                 
             |                                                              
             
    
         
    
    
 |