| 
                 
                    Closing price on 6/23/2011
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    14.00 | 
                 
                
                    | High | 
                    14.10 | 
                 
                
                    | Low | 
                    13.50 | 
                     
                
                    | Volume | 
                    428,060 | 
                                 
                
                    | Split-adjusted Price | 
                    13.80 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
OGC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/23/2011
             | 
            
                -0.20 / -1.43%
             |             
            
                14.00
             |           
            
                14.10
             |               
            
                13.50
             |                           
            
                13.80
             | 
            
                13.80
             |                     
            
                13.80
             |                                 
            
                428,060
             |            
            
                 
             |                                       
         
    
        
            | 
                6/22/2011
             | 
            
                -0.30 / -2.10%
             |             
            
                14.60
             |           
            
                14.70
             |               
            
                14.00
             |                           
            
                14.00
             | 
            
                14.00
             |                     
            
                14.00
             |                                 
            
                256,120
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/21/2011
             | 
            
                +0.60 / +4.38%
             |             
            
                13.60
             |           
            
                14.30
             |               
            
                13.40
             |                           
            
                14.30
             | 
            
                14.30
             |                     
            
                14.30
             |                                 
            
                655,940
             |            
            
                 
             |                                       
         
    
        
            | 
                6/20/2011
             | 
            
                -0.60 / -4.20%
             |             
            
                14.00
             |           
            
                14.10
             |               
            
                13.60
             |                           
            
                13.70
             | 
            
                13.70
             |                     
            
                13.70
             |                                 
            
                966,020
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/17/2011
             | 
            
                -0.70 / -4.67%
             |             
            
                14.50
             |           
            
                15.00
             |               
            
                14.30
             |                           
            
                14.30
             | 
            
                14.30
             |                     
            
                14.30
             |                                 
            
                734,820
             |            
            
                 
             |                                       
         
    
        
            | 
                6/16/2011
             | 
            
                0.00 / 0.00%
             |             
            
                14.90
             |           
            
                15.30
             |               
            
                14.70
             |                           
            
                15.00
             | 
            
                15.00
             |                     
            
                15.00
             |                                 
            
                424,020
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/15/2011
             | 
            
                -0.70 / -4.46%
             |             
            
                15.40
             |           
            
                15.60
             |               
            
                15.00
             |                           
            
                15.00
             | 
            
                15.00
             |                     
            
                15.00
             |                                 
            
                587,250
             |            
            
                 
             |                                       
         
    
        
            | 
                6/14/2011
             | 
            
                -0.50 / -3.09%
             |             
            
                15.80
             |           
            
                17.00
             |               
            
                15.70
             |                           
            
                15.70
             | 
            
                15.70
             |                     
            
                15.70
             |                                 
            
                1,844,560
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/13/2011
             | 
            
                -0.10 / -0.61%
             |             
            
                16.30
             |           
            
                16.50
             |               
            
                15.60
             |                           
            
                16.20
             | 
            
                16.20
             |                     
            
                16.20
             |                                 
            
                862,310
             |            
            
                 
             |                                       
         
    
        
            | 
                6/10/2011
             | 
            
                +0.70 / +4.49%
             |             
            
                16.00
             |           
            
                16.30
             |               
            
                15.70
             |                           
            
                16.30
             | 
            
                16.30
             |                     
            
                16.30
             |                                 
            
                880,110
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/9/2011
             | 
            
                +0.30 / +1.96%
             |             
            
                15.30
             |           
            
                15.70
             |               
            
                14.80
             |                           
            
                15.60
             | 
            
                15.60
             |                     
            
                15.60
             |                                 
            
                531,330
             |            
            
                 
             |                                       
         
    
        
            | 
                6/8/2011
             | 
            
                0.00 / 0.00%
             |             
            
                15.50
             |           
            
                15.90
             |               
            
                14.90
             |                           
            
                15.30
             | 
            
                15.30
             |                     
            
                15.30
             |                                 
            
                453,710
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/7/2011
             | 
            
                +0.70 / +4.79%
             |             
            
                14.90
             |           
            
                15.30
             |               
            
                14.90
             |                           
            
                15.30
             | 
            
                15.30
             |                     
            
                15.30
             |                                 
            
                635,110
             |            
            
                 
             |                                       
         
    
        
            | 
                6/6/2011
             | 
            
                -0.70 / -4.58%
             |             
            
                14.90
             |           
            
                15.40
             |               
            
                14.60
             |                           
            
                14.60
             | 
            
                14.60
             |                     
            
                14.60
             |                                 
            
                214,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/3/2011
             | 
            
                -0.10 / -0.65%
             |             
            
                16.10
             |           
            
                16.10
             |               
            
                15.10
             |                           
            
                15.30
             | 
            
                15.30
             |                     
            
                15.30
             |                                 
            
                269,280
             |            
            
                 
             |                                       
         
    
        
            | 
                6/2/2011
             | 
            
                +0.70 / +4.76%
             |             
            
                15.10
             |           
            
                15.40
             |               
            
                15.00
             |                           
            
                15.40
             | 
            
                15.40
             |                     
            
                15.40
             |                                 
            
                304,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/1/2011
             | 
            
                0.00 / 0.00%
             |             
            
                14.30
             |           
            
                14.80
             |               
            
                14.00
             |                           
            
                14.70
             | 
            
                14.70
             |                     
            
                14.70
             |                                 
            
                690,170
             |            
            
                 
             |                                       
         
    
        
            | 
                5/31/2011
             | 
            
                +0.40 / +2.80%
             |             
            
                14.30
             |           
            
                14.70
             |               
            
                14.20
             |                           
            
                14.70
             | 
            
                14.70
             |                     
            
                14.70
             |                                 
            
                301,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/30/2011
             | 
            
                -0.60 / -4.03%
             |             
            
                15.50
             |           
            
                15.50
             |               
            
                14.30
             |                           
            
                14.30
             | 
            
                14.30
             |                     
            
                14.30
             |                                 
            
                217,280
             |            
            
                 
             |                                       
         
    
        
            | 
                5/27/2011
             | 
            
                +0.70 / +4.93%
             |             
            
                14.80
             |           
            
                14.90
             |               
            
                14.50
             |                           
            
                14.90
             | 
            
                14.90
             |                     
            
                14.90
             |                                 
            
                256,750
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/26/2011
             | 
            
                -0.70 / -4.70%
             |             
            
                14.20
             |           
            
                15.00
             |               
            
                14.20
             |                           
            
                14.20
             | 
            
                14.20
             |                     
            
                14.20
             |                                 
            
                926,270
             |            
            
                 
             |                                       
         
    
        
            | 
                5/25/2011
             | 
            
                -0.70 / -4.49%
             |             
            
                14.90
             |           
            
                15.40
             |               
            
                14.90
             |                           
            
                14.90
             | 
            
                14.90
             |                     
            
                14.90
             |                                 
            
                554,880
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/24/2011
             | 
            
                -0.80 / -4.88%
             |             
            
                16.40
             |           
            
                16.40
             |               
            
                15.60
             |                           
            
                15.60
             | 
            
                15.60
             |                     
            
                15.60
             |                                 
            
                83,920
             |            
            
                 
             |                                       
         
    
        
            | 
                5/23/2011
             | 
            
                -0.70 / -4.09%
             |             
            
                17.10
             |           
            
                17.10
             |               
            
                16.40
             |                           
            
                16.40
             | 
            
                16.40
             |                     
            
                16.40
             |                                 
            
                451,790
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/20/2011
             | 
            
                -0.20 / -1.16%
             |             
            
                17.50
             |           
            
                17.50
             |               
            
                17.00
             |                           
            
                17.10
             | 
            
                17.10
             |                     
            
                17.10
             |                                 
            
                260,900
             |            
            
                 
             |                                       
         
    
        
            | 
                5/19/2011
             | 
            
                -0.10 / -0.57%
             |             
            
                17.40
             |           
            
                17.50
             |               
            
                17.30
             |                           
            
                17.30
             | 
            
                17.30
             |                     
            
                17.30
             |                                 
            
                271,770
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/18/2011
             | 
            
                0.00 / 0.00%
             |             
            
                17.40
             |           
            
                17.80
             |               
            
                17.40
             |                           
            
                17.40
             | 
            
                17.40
             |                     
            
                17.40
             |                                 
            
                195,580
             |            
            
                 
             |                                       
         
    
        
            | 
                5/17/2011
             | 
            
                -0.40 / -2.25%
             |             
            
                17.30
             |           
            
                17.80
             |               
            
                17.20
             |                           
            
                17.40
             | 
            
                17.40
             |                     
            
                17.40
             |                                 
            
                75,670
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/16/2011
             | 
            
                0.00 / 0.00%
             |             
            
                17.80
             |           
            
                17.80
             |               
            
                17.50
             |                           
            
                17.80
             | 
            
                17.80
             |                     
            
                17.80
             |                                 
            
                2,084,830
             |            
            
                 
             |                                       
         
    
        
            | 
                5/13/2011
             | 
            
                -0.10 / -0.56%
             |             
            
                18.00
             |           
            
                18.00
             |               
            
                17.80
             |                           
            
                17.80
             | 
            
                17.80
             |                     
            
                17.80
             |                                 
            
                79,030
             |  
            
                 
             |                                                              
             
    
         
    
    
 |