| 
                 
                    Closing price on 11/18/2010
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    29.00 | 
                 
                
                    | High | 
                    29.80 | 
                 
                
                    | Low | 
                    29.00 | 
                     
                
                    | Volume | 
                    16,500 | 
                                 
                
                    | Split-adjusted Price | 
                    21.28 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
XMC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                11/18/2010
             | 
            
                +0.70 / +2.46%
             |             
            
                29.00
             |           
            
                29.80
             |               
            
                29.00
             |                           
            
                29.10
             | 
            
                29.24
             |                     
            
                21.28
             |                                 
            
                16,500
             |            
            
                 
             |                                       
         
    
        
            | 
                11/17/2010
             | 
            
                +0.80 / +2.90%
             |             
            
                28.00
             |           
            
                28.50
             |               
            
                28.00
             |                           
            
                28.40
             | 
            
                28.13
             |                     
            
                20.76
             |                                 
            
                45,000
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/16/2010
             | 
            
                -0.20 / -0.72%
             |             
            
                27.00
             |           
            
                29.80
             |               
            
                27.00
             |                           
            
                27.60
             | 
            
                28.14
             |                     
            
                20.18
             |                                 
            
                38,700
             |            
            
                 
             |                                       
         
    
        
            | 
                11/15/2010
             | 
            
                0.00 / 0.00%
             |             
            
                26.30
             |           
            
                30.10
             |               
            
                26.30
             |                           
            
                27.80
             | 
            
                29.00
             |                     
            
                20.33
             |                                 
            
                44,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/12/2010
             | 
            
                -2.00 / -6.67%
             |             
            
                29.00
             |           
            
                29.10
             |               
            
                28.00
             |                           
            
                28.00
             | 
            
                28.20
             |                     
            
                20.47
             |                                 
            
                73,000
             |            
            
                 
             |                                       
         
    
        
            | 
                11/11/2010
             | 
            
                -0.30 / -0.99%
             |             
            
                30.40
             |           
            
                30.40
             |               
            
                29.90
             |                           
            
                30.00
             | 
            
                30.06
             |                     
            
                21.93
             |                                 
            
                28,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/10/2010
             | 
            
                -0.70 / -2.26%
             |             
            
                30.10
             |           
            
                31.40
             |               
            
                30.00
             |                           
            
                30.30
             | 
            
                30.49
             |                     
            
                22.15
             |                                 
            
                17,300
             |            
            
                 
             |                                       
         
    
        
            | 
                11/9/2010
             | 
            
                -2.10 / -6.34%
             |             
            
                32.00
             |           
            
                33.00
             |               
            
                30.80
             |                           
            
                31.00
             | 
            
                31.48
             |                     
            
                22.67
             |                                 
            
                64,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/8/2010
             | 
            
                0.00 / 0.00%
             |             
            
                33.10
             |           
            
                33.10
             |               
            
                33.10
             |                           
            
                33.10
             | 
            
                33.10
             |                     
            
                24.20
             |                                 
            
                1,100
             |            
            
                 
             |                                       
         
    
        
            | 
                11/5/2010
             | 
            
                +1.10 / +3.25%
             |             
            
                34.00
             |           
            
                35.00
             |               
            
                34.00
             |                           
            
                34.90
             | 
            
                34.68
             |                     
            
                25.52
             |                                 
            
                13,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/4/2010
             | 
            
                +0.70 / +2.11%
             |             
            
                33.50
             |           
            
                33.80
             |               
            
                33.20
             |                           
            
                33.80
             | 
            
                33.62
             |                     
            
                24.71
             |                                 
            
                3,900
             |            
            
                 
             |                                       
         
    
        
            | 
                11/3/2010
             | 
            
                -0.30 / -0.90%
             |             
            
                34.20
             |           
            
                34.20
             |               
            
                32.90
             |                           
            
                33.10
             | 
            
                33.09
             |                     
            
                24.20
             |                                 
            
                16,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                11/2/2010
             | 
            
                -1.40 / -4.02%
             |             
            
                34.80
             |           
            
                34.80
             |               
            
                33.30
             |                           
            
                33.40
             | 
            
                33.59
             |                     
            
                24.42
             |                                 
            
                14,700
             |            
            
                 
             |                                       
         
    
        
            | 
                11/1/2010
             | 
            
                0.00 / 0.00%
             |             
            
                35.00
             |           
            
                35.00
             |               
            
                34.30
             |                           
            
                34.80
             | 
            
                34.62
             |                     
            
                25.44
             |                                 
            
                22,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/29/2010
             | 
            
                +0.40 / +1.16%
             |             
            
                34.70
             |           
            
                35.90
             |               
            
                34.50
             |                           
            
                34.90
             | 
            
                34.96
             |                     
            
                25.52
             |                                 
            
                48,300
             |            
            
                 
             |                                       
         
    
        
            | 
                10/28/2010
             | 
            
                -0.50 / -1.43%
             |             
            
                35.20
             |           
            
                35.20
             |               
            
                34.50
             |                           
            
                34.50
             | 
            
                34.73
             |                     
            
                25.22
             |                                 
            
                26,200
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/27/2010
             | 
            
                -1.20 / -3.31%
             |             
            
                36.00
             |           
            
                36.00
             |               
            
                34.80
             |                           
            
                35.00
             | 
            
                35.18
             |                     
            
                25.59
             |                                 
            
                31,100
             |            
            
                 
             |                                       
         
    
        
            | 
                10/26/2010
             | 
            
                +1.20 / +3.43%
             |             
            
                35.60
             |           
            
                36.20
             |               
            
                35.60
             |                           
            
                36.20
             | 
            
                35.94
             |                     
            
                26.47
             |                                 
            
                64,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/25/2010
             | 
            
                0.00 / 0.00%
             |             
            
                33.50
             |           
            
                35.00
             |               
            
                33.10
             |                           
            
                35.00
             | 
            
                33.90
             |                     
            
                25.59
             |                                 
            
                40,600
             |            
            
                 
             |                                       
         
    
        
            | 
                10/22/2010
             | 
            
                -2.10 / -6.02%
             |             
            
                34.50
             |           
            
                35.10
             |               
            
                32.80
             |                           
            
                32.80
             | 
            
                33.09
             |                     
            
                23.98
             |                                 
            
                103,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/21/2010
             | 
            
                -1.00 / -2.79%
             |             
            
                34.50
             |           
            
                36.90
             |               
            
                34.50
             |                           
            
                34.90
             | 
            
                35.18
             |                     
            
                25.52
             |                                 
            
                25,800
             |            
            
                 
             |                                       
         
    
        
            | 
                10/20/2010
             | 
            
                -0.40 / -1.10%
             |             
            
                38.90
             |           
            
                38.90
             |               
            
                34.50
             |                           
            
                35.90
             | 
            
                35.39
             |                     
            
                26.25
             |                                 
            
                64,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/19/2010
             | 
            
                -1.10 / -2.94%
             |             
            
                36.20
             |           
            
                36.90
             |               
            
                35.20
             |                           
            
                36.30
             | 
            
                36.59
             |                     
            
                26.54
             |                                 
            
                15,000
             |            
            
                 
             |                                       
         
    
        
            | 
                10/18/2010
             | 
            
                0.00 / 0.00%
             |             
            
                37.60
             |           
            
                37.60
             |               
            
                37.10
             |                           
            
                37.40
             | 
            
                37.45
             |                     
            
                27.34
             |                                 
            
                6,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/15/2010
             | 
            
                -0.40 / -1.06%
             |             
            
                37.00
             |           
            
                37.90
             |               
            
                37.00
             |                           
            
                37.20
             | 
            
                37.63
             |                     
            
                27.20
             |                                 
            
                1,600
             |            
            
                 
             |                                       
         
    
        
            | 
                10/14/2010
             | 
            
                -0.20 / -0.53%
             |             
            
                38.00
             |           
            
                38.00
             |               
            
                37.60
             |                           
            
                37.60
             | 
            
                37.62
             |                     
            
                27.49
             |                                 
            
                5,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/13/2010
             | 
            
                +0.50 / +1.34%
             |             
            
                37.50
             |           
            
                37.90
             |               
            
                37.50
             |                           
            
                37.80
             | 
            
                37.77
             |                     
            
                27.64
             |                                 
            
                11,200
             |            
            
                 
             |                                       
         
    
        
            | 
                10/12/2010
             | 
            
                -0.50 / -1.32%
             |             
            
                38.00
             |           
            
                38.00
             |               
            
                37.20
             |                           
            
                37.30
             | 
            
                37.51
             |                     
            
                27.27
             |                                 
            
                36,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                10/11/2010
             | 
            
                0.00 / 0.00%
             |             
            
                38.10
             |           
            
                38.80
             |               
            
                37.80
             |                           
            
                37.80
             | 
            
                38.07
             |                     
            
                27.64
             |                                 
            
                14,900
             |            
            
                 
             |                                       
         
    
        
            | 
                10/8/2010
             | 
            
                +1.00 / +2.63%
             |             
            
                39.00
             |           
            
                39.00
             |               
            
                37.50
             |                           
            
                39.00
             | 
            
                38.48
             |                     
            
                28.51
             |                                 
            
                6,800
             |  
            
                 
             |                                                              
             
    
         
    
    
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