| 
                 
                    Closing price on 6/28/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    22.50 | 
                 
                
                    | High | 
                    22.50 | 
                 
                
                    | Low | 
                    22.40 | 
                     
                
                    | Volume | 
                    12,740 | 
                                 
                
                    | Split-adjusted Price | 
                    3.38 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
ACC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                6/28/2012
             | 
            
                +0.10 / +0.45%
             |             
            
                22.50
             |           
            
                22.50
             |               
            
                22.40
             |                           
            
                22.50
             | 
            
                22.50
             |                     
            
                3.38
             |                                 
            
                12,740
             |            
            
                 
             |                                       
         
    
        
            | 
                6/27/2012
             | 
            
                +0.10 / +0.45%
             |             
            
                22.90
             |           
            
                23.20
             |               
            
                22.40
             |                           
            
                22.40
             | 
            
                22.40
             |                     
            
                3.37
             |                                 
            
                29,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/26/2012
             | 
            
                -0.20 / -0.89%
             |             
            
                22.50
             |           
            
                22.60
             |               
            
                22.30
             |                           
            
                22.30
             | 
            
                22.30
             |                     
            
                3.35
             |                                 
            
                18,370
             |            
            
                 
             |                                       
         
    
        
            | 
                6/25/2012
             | 
            
                0.00 / 0.00%
             |             
            
                22.10
             |           
            
                23.00
             |               
            
                22.10
             |                           
            
                22.50
             | 
            
                22.50
             |                     
            
                3.38
             |                                 
            
                21,040
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/22/2012
             | 
            
                -0.70 / -3.02%
             |             
            
                22.50
             |           
            
                22.50
             |               
            
                22.50
             |                           
            
                22.50
             | 
            
                22.50
             |                     
            
                3.38
             |                                 
            
                1,050
             |            
            
                 
             |                                       
         
    
        
            | 
                6/21/2012
             | 
            
                +0.20 / +0.87%
             |             
            
                23.00
             |           
            
                23.20
             |               
            
                22.90
             |                           
            
                23.20
             | 
            
                23.20
             |                     
            
                3.49
             |                                 
            
                7,440
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/20/2012
             | 
            
                +0.30 / +1.32%
             |             
            
                22.70
             |           
            
                23.00
             |               
            
                22.70
             |                           
            
                23.00
             | 
            
                23.00
             |                     
            
                3.46
             |                                 
            
                22,700
             |            
            
                 
             |                                       
         
    
        
            | 
                6/19/2012
             | 
            
                -0.30 / -1.30%
             |             
            
                22.90
             |           
            
                23.00
             |               
            
                22.70
             |                           
            
                22.70
             | 
            
                22.70
             |                     
            
                3.41
             |                                 
            
                11,340
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/18/2012
             | 
            
                +0.10 / +0.44%
             |             
            
                23.30
             |           
            
                23.30
             |               
            
                22.90
             |                           
            
                23.00
             | 
            
                23.00
             |                     
            
                3.46
             |                                 
            
                10,100
             |            
            
                 
             |                                       
         
    
        
            | 
                6/15/2012
             | 
            
                0.00 / 0.00%
             |             
            
                22.90
             |           
            
                23.10
             |               
            
                22.80
             |                           
            
                22.90
             | 
            
                22.90
             |                     
            
                3.44
             |                                 
            
                20,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/14/2012
             | 
            
                +0.20 / +0.88%
             |             
            
                22.70
             |           
            
                22.90
             |               
            
                22.50
             |                           
            
                22.90
             | 
            
                22.90
             |                     
            
                3.44
             |                                 
            
                1,130
             |            
            
                 
             |                                       
         
    
        
            | 
                6/13/2012
             | 
            
                +0.20 / +0.89%
             |             
            
                22.50
             |           
            
                23.00
             |               
            
                22.50
             |                           
            
                22.70
             | 
            
                22.70
             |                     
            
                3.41
             |                                 
            
                10,860
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/12/2012
             | 
            
                -0.10 / -0.44%
             |             
            
                23.40
             |           
            
                23.40
             |               
            
                22.50
             |                           
            
                22.50
             | 
            
                22.50
             |                     
            
                3.38
             |                                 
            
                32,930
             |            
            
                 
             |                                       
         
    
        
            | 
                6/11/2012
             | 
            
                0.00 / 0.00%
             |             
            
                23.20
             |           
            
                23.20
             |               
            
                22.60
             |                           
            
                22.60
             | 
            
                22.60
             |                     
            
                3.40
             |                                 
            
                4,260
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/8/2012
             | 
            
                0.00 / 0.00%
             |             
            
                22.60
             |           
            
                23.70
             |               
            
                22.60
             |                           
            
                22.60
             | 
            
                22.60
             |                     
            
                3.40
             |                                 
            
                50,240
             |            
            
                 
             |                                       
         
    
        
            | 
                6/7/2012
             | 
            
                +0.40 / +1.80%
             |             
            
                22.20
             |           
            
                23.10
             |               
            
                22.20
             |                           
            
                22.60
             | 
            
                22.60
             |                     
            
                3.40
             |                                 
            
                5,970
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/6/2012
             | 
            
                +0.90 / +4.23%
             |             
            
                20.70
             |           
            
                22.30
             |               
            
                20.70
             |                           
            
                22.20
             | 
            
                22.20
             |                     
            
                3.34
             |                                 
            
                19,120
             |            
            
                 
             |                                       
         
    
        
            | 
                6/5/2012
             | 
            
                -0.70 / -3.18%
             |             
            
                22.00
             |           
            
                22.00
             |               
            
                20.90
             |                           
            
                21.30
             | 
            
                21.30
             |                     
            
                3.20
             |                                 
            
                2,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                6/4/2012
             | 
            
                0.00 / 0.00%
             |             
            
                22.00
             |           
            
                22.00
             |               
            
                20.90
             |                           
            
                22.00
             | 
            
                22.00
             |                     
            
                3.31
             |                                 
            
                37,410
             |            
            
                 
             |                                       
         
    
        
            | 
                6/1/2012
             | 
            
                -0.10 / -0.45%
             |             
            
                23.00
             |           
            
                23.00
             |               
            
                22.00
             |                           
            
                22.00
             | 
            
                22.00
             |                     
            
                3.31
             |                                 
            
                2,480
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/31/2012
             | 
            
                -0.20 / -0.90%
             |             
            
                23.30
             |           
            
                23.30
             |               
            
                22.10
             |                           
            
                22.10
             | 
            
                22.10
             |                     
            
                3.32
             |                                 
            
                60,950
             |            
            
                 
             |                                       
         
    
        
            | 
                5/30/2012
             | 
            
                +1.00 / +4.69%
             |             
            
                22.30
             |           
            
                22.30
             |               
            
                22.20
             |                           
            
                22.30
             | 
            
                22.30
             |                     
            
                3.35
             |                                 
            
                17,090
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/29/2012
             | 
            
                +1.00 / +4.93%
             |             
            
                21.20
             |           
            
                21.30
             |               
            
                20.30
             |                           
            
                21.30
             | 
            
                21.30
             |                     
            
                3.20
             |                                 
            
                39,750
             |            
            
                 
             |                                       
         
    
        
            | 
                5/28/2012
             | 
            
                +0.10 / +0.50%
             |             
            
                21.20
             |           
            
                21.20
             |               
            
                20.20
             |                           
            
                20.30
             | 
            
                20.30
             |                     
            
                3.05
             |                                 
            
                21,710
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/25/2012
             | 
            
                +0.90 / +4.66%
             |             
            
                20.20
             |           
            
                20.20
             |               
            
                19.20
             |                           
            
                20.20
             | 
            
                20.20
             |                     
            
                3.04
             |                                 
            
                22,900
             |            
            
                 
             |                                       
         
    
        
            | 
                5/24/2012
             | 
            
                -1.00 / -4.93%
             |             
            
                20.00
             |           
            
                20.70
             |               
            
                19.30
             |                           
            
                19.30
             | 
            
                19.30
             |                     
            
                2.90
             |                                 
            
                36,730
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/23/2012
             | 
            
                -1.00 / -4.69%
             |             
            
                21.60
             |           
            
                21.60
             |               
            
                20.30
             |                           
            
                20.30
             | 
            
                20.30
             |                     
            
                3.05
             |                                 
            
                50,940
             |            
            
                 
             |                                       
         
    
        
            | 
                5/22/2012
             | 
            
                -1.10 / -4.91%
             |             
            
                22.10
             |           
            
                22.10
             |               
            
                21.30
             |                           
            
                21.30
             | 
            
                21.30
             |                     
            
                3.20
             |                                 
            
                36,680
             |  
            
                 
             |                                                              
             
    
        			
            | 
                5/21/2012
             | 
            
                -0.30 / -1.32%
             |             
            
                21.60
             |           
            
                22.50
             |               
            
                21.60
             |                           
            
                22.40
             | 
            
                22.40
             |                     
            
                3.37
             |                                 
            
                54,960
             |            
            
                 
             |                                       
         
    
        
            | 
                5/18/2012
             | 
            
                -1.10 / -4.62%
             |             
            
                22.70
             |           
            
                22.70
             |               
            
                22.70
             |                           
            
                22.70
             | 
            
                22.70
             |                     
            
                3.41
             |                                 
            
                17,450
             |  
            
                 
             |                                                              
             
    
         
    
    
 |