| 
                 
                    Closing price on 9/20/2012
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    23.90 | 
                 
                
                    | High | 
                    23.90 | 
                 
                
                    | Low | 
                    23.50 | 
                     
                
                    | Volume | 
                    9,910 | 
                                 
                
                    | Split-adjusted Price | 
                    3.53 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
ACC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                9/20/2012
             | 
            
                -0.30 / -1.26%
             |             
            
                23.90
             |           
            
                23.90
             |               
            
                23.50
             |                           
            
                23.50
             | 
            
                23.50
             |                     
            
                3.53
             |                                 
            
                9,910
             |            
            
                 
             |                                       
         
    
        
            | 
                9/19/2012
             | 
            
                0.00 / 0.00%
             |             
            
                23.80
             |           
            
                23.80
             |               
            
                23.50
             |                           
            
                23.80
             | 
            
                23.80
             |                     
            
                3.58
             |                                 
            
                510
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/18/2012
             | 
            
                +0.30 / +1.28%
             |             
            
                23.80
             |           
            
                23.80
             |               
            
                23.40
             |                           
            
                23.80
             | 
            
                23.80
             |                     
            
                3.58
             |                                 
            
                17,640
             |            
            
                 
             |                                       
         
    
        
            | 
                9/17/2012
             | 
            
                +0.10 / +0.43%
             |             
            
                23.50
             |           
            
                23.50
             |               
            
                23.40
             |                           
            
                23.50
             | 
            
                23.50
             |                     
            
                3.53
             |                                 
            
                7,620
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/14/2012
             | 
            
                +0.10 / +0.43%
             |             
            
                23.40
             |           
            
                24.00
             |               
            
                23.40
             |                           
            
                23.40
             | 
            
                23.40
             |                     
            
                3.52
             |                                 
            
                2,610
             |            
            
                 
             |                                       
         
    
        
            | 
                9/13/2012
             | 
            
                0.00 / 0.00%
             |             
            
                23.50
             |           
            
                23.50
             |               
            
                23.20
             |                           
            
                23.30
             | 
            
                23.30
             |                     
            
                3.50
             |                                 
            
                5,030
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/12/2012
             | 
            
                -0.20 / -0.85%
             |             
            
                23.90
             |           
            
                23.90
             |               
            
                23.20
             |                           
            
                23.30
             | 
            
                23.30
             |                     
            
                3.50
             |                                 
            
                3,040
             |            
            
                 
             |                                       
         
    
        
            | 
                9/11/2012
             | 
            
                -0.20 / -0.84%
             |             
            
                23.20
             |           
            
                23.90
             |               
            
                23.20
             |                           
            
                23.50
             | 
            
                23.50
             |                     
            
                3.53
             |                                 
            
                13,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/10/2012
             | 
            
                0.00 / 0.00%
             |             
            
                23.20
             |           
            
                23.70
             |               
            
                23.00
             |                           
            
                23.70
             | 
            
                23.70
             |                     
            
                3.56
             |                                 
            
                6,170
             |            
            
                 
             |                                       
         
    
        
            | 
                9/7/2012
             | 
            
                +0.50 / +2.16%
             |             
            
                24.10
             |           
            
                24.10
             |               
            
                23.30
             |                           
            
                23.70
             | 
            
                23.70
             |                     
            
                3.56
             |                                 
            
                3,710
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/6/2012
             | 
            
                -0.80 / -3.33%
             |             
            
                23.40
             |           
            
                23.90
             |               
            
                23.20
             |                           
            
                23.20
             | 
            
                23.20
             |                     
            
                3.49
             |                                 
            
                520
             |            
            
                 
             |                                       
         
    
        
            | 
                9/5/2012
             | 
            
                +0.10 / +0.42%
             |             
            
                23.40
             |           
            
                24.00
             |               
            
                23.40
             |                           
            
                24.00
             | 
            
                24.00
             |                     
            
                3.61
             |                                 
            
                1,960
             |  
            
                 
             |                                                              
             
    
        			
            | 
                9/4/2012
             | 
            
                0.00 / 0.00%
             |             
            
                24.00
             |           
            
                24.00
             |               
            
                23.90
             |                           
            
                23.90
             | 
            
                23.90
             |                     
            
                3.59
             |                                 
            
                2,370
             |            
            
                 
             |                                       
         
    
        
            | 
                8/31/2012
             | 
            
                -0.10 / -0.42%
             |             
            
                23.90
             |           
            
                23.90
             |               
            
                23.90
             |                           
            
                23.90
             | 
            
                23.90
             |                     
            
                3.59
             |                                 
            
                20
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/30/2012
             | 
            
                0.00 / 0.00%
             |             
            
                24.00
             |           
            
                24.00
             |               
            
                24.00
             |                           
            
                24.00
             | 
            
                24.00
             |                     
            
                3.61
             |                                 
            
                10,100
             |            
            
                 
             |                                       
         
    
        
            | 
                8/29/2012
             | 
            
                0.00 / 0.00%
             |             
            
                24.00
             |           
            
                24.00
             |               
            
                24.00
             |                           
            
                24.00
             | 
            
                24.00
             |                     
            
                3.61
             |                                 
            
                230
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/28/2012
             | 
            
                0.00 / 0.00%
             |             
            
                23.80
             |           
            
                24.00
             |               
            
                23.80
             |                           
            
                24.00
             | 
            
                24.00
             |                     
            
                3.61
             |                                 
            
                2,220
             |            
            
                 
             |                                       
         
    
        
            | 
                8/27/2012
             | 
            
                0.00 / 0.00%
             |             
            
                24.00
             |           
            
                24.00
             |               
            
                22.80
             |                           
            
                24.00
             | 
            
                24.00
             |                     
            
                3.61
             |                                 
            
                26,010
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/24/2012
             | 
            
                -0.50 / -2.04%
             |             
            
                23.50
             |           
            
                24.40
             |               
            
                23.50
             |                           
            
                24.00
             | 
            
                24.00
             |                     
            
                3.61
             |                                 
            
                12,270
             |            
            
                 
             |                                       
         
    
        
            | 
                8/23/2012
             | 
            
                -0.20 / -0.81%
             |             
            
                23.70
             |           
            
                25.00
             |               
            
                23.50
             |                           
            
                24.50
             | 
            
                24.50
             |                     
            
                3.68
             |                                 
            
                34,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/22/2012
             | 
            
                +0.70 / +2.92%
             |             
            
                23.20
             |           
            
                25.00
             |               
            
                23.20
             |                           
            
                24.70
             | 
            
                24.70
             |                     
            
                3.71
             |                                 
            
                29,540
             |            
            
                 
             |                                       
         
    
        
            | 
                8/21/2012
             | 
            
                -1.20 / -4.76%
             |             
            
                25.20
             |           
            
                25.30
             |               
            
                24.00
             |                           
            
                24.00
             | 
            
                24.00
             |                     
            
                3.61
             |                                 
            
                76,020
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/20/2012
             | 
            
                +0.60 / +2.44%
             |             
            
                24.90
             |           
            
                25.40
             |               
            
                24.80
             |                           
            
                25.20
             | 
            
                25.20
             |                     
            
                3.79
             |                                 
            
                13,150
             |            
            
                 
             |                                       
         
    
        
            | 
                8/17/2012
             | 
            
                -0.10 / -0.40%
             |             
            
                24.10
             |           
            
                24.80
             |               
            
                24.00
             |                           
            
                24.60
             | 
            
                24.60
             |                     
            
                3.70
             |                                 
            
                580
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/16/2012
             | 
            
                -0.10 / -0.40%
             |             
            
                24.10
             |           
            
                24.70
             |               
            
                23.60
             |                           
            
                24.70
             | 
            
                24.70
             |                     
            
                3.71
             |                                 
            
                6,010
             |            
            
                 
             |                                       
         
    
        
            | 
                8/15/2012
             | 
            
                +0.70 / +2.90%
             |             
            
                25.20
             |           
            
                25.20
             |               
            
                24.10
             |                           
            
                24.80
             | 
            
                24.80
             |                     
            
                3.73
             |                                 
            
                1,310
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/14/2012
             | 
            
                -0.40 / -1.63%
             |             
            
                25.00
             |           
            
                25.00
             |               
            
                24.10
             |                           
            
                24.10
             | 
            
                24.10
             |                     
            
                3.62
             |                                 
            
                420
             |            
            
                 
             |                                       
         
    
        
            | 
                8/13/2012
             | 
            
                0.00 / 0.00%
             |             
            
                24.50
             |           
            
                24.50
             |               
            
                24.50
             |                           
            
                24.50
             | 
            
                24.50
             |                     
            
                3.68
             |                                 
            
                3,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                8/10/2012
             | 
            
                0.00 / 0.00%
             |             
            
                25.00
             |           
            
                25.00
             |               
            
                24.00
             |                           
            
                24.50
             | 
            
                24.50
             |                     
            
                3.68
             |                                 
            
                18,180
             |            
            
                 
             |                                       
         
    
        
            | 
                8/9/2012
             | 
            
                0.00 / 0.00%
             |             
            
                25.20
             |           
            
                25.20
             |               
            
                24.50
             |                           
            
                24.50
             | 
            
                24.50
             |                     
            
                3.68
             |                                 
            
                1,710
             |  
            
                 
             |                                                              
             
    
         
    
    
 |