| 
                 
                    Closing price on 4/16/2008
                 
             | 
            
                                
             | 
         
         
 
    
        
                      
                
                    | Open | 
                    22.70 | 
                 
                
                    | High | 
                    22.70 | 
                 
                
                    | Low | 
                    22.70 | 
                     
                
                    | Volume | 
                    1,600 | 
                                 
                
                    | Split-adjusted Price | 
                    16.60 | 
                 
             
            
            
                
             
         | 
        
            
            
             
                            
         | 
     
 
XMC Historical Quote 
        
            
                | 
                    Date
                 | 
                
                    Change
                 |                 
                
                    Open
                 |          
                
                    High
                 |            
                
                    Low
                 |                                                 
                
                    Close
                 | 
                
                    Average
                 | 
                
                    Adjusted Close
                 |                                                 
                
                    Volume
                 |     
                
                     
                 |                                       
                             
    
        			
            | 
                4/16/2008
             | 
            
                0.00 / 0.00%
             |             
            
                22.70
             |           
            
                22.70
             |               
            
                22.70
             |                           
            
                22.70
             | 
            
                22.70
             |                     
            
                16.60
             |                                 
            
                1,600
             |            
            
                 
             |                                       
         
    
        
            | 
                4/11/2008
             | 
            
                -0.70 / -2.92%
             |             
            
                23.30
             |           
            
                23.30
             |               
            
                23.30
             |                           
            
                23.30
             | 
            
                23.30
             |                     
            
                17.04
             |                                 
            
                32,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/10/2008
             | 
            
                -0.70 / -2.83%
             |             
            
                24.00
             |           
            
                24.00
             |               
            
                24.00
             |                           
            
                24.00
             | 
            
                24.00
             |                     
            
                17.55
             |                                 
            
                6,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/9/2008
             | 
            
                -0.70 / -2.76%
             |             
            
                25.40
             |           
            
                25.40
             |               
            
                24.70
             |                           
            
                24.70
             | 
            
                24.70
             |                     
            
                18.06
             |                                 
            
                32,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/8/2008
             | 
            
                +0.30 / +1.20%
             |             
            
                25.80
             |           
            
                25.80
             |               
            
                24.60
             |                           
            
                25.40
             | 
            
                25.35
             |                     
            
                18.57
             |                                 
            
                45,800
             |            
            
                 
             |                                       
         
    
        
            | 
                4/7/2008
             | 
            
                0.00 / 0.00%
             |             
            
                25.10
             |           
            
                25.10
             |               
            
                25.10
             |                           
            
                25.10
             | 
            
                25.10
             |                     
            
                18.35
             |                                 
            
                26,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/4/2008
             | 
            
                +0.40 / +1.67%
             |             
            
                24.40
             |           
            
                24.40
             |               
            
                24.40
             |                           
            
                24.40
             | 
            
                24.40
             |                     
            
                17.84
             |                                 
            
                14,400
             |            
            
                 
             |                                       
         
    
        
            | 
                4/3/2008
             | 
            
                +0.40 / +1.69%
             |             
            
                24.00
             |           
            
                24.00
             |               
            
                24.00
             |                           
            
                24.00
             | 
            
                24.00
             |                     
            
                17.55
             |                                 
            
                6,800
             |  
            
                 
             |                                                              
             
    
        			
            | 
                4/2/2008
             | 
            
                +0.40 / +1.72%
             |             
            
                23.60
             |           
            
                23.60
             |               
            
                23.60
             |                           
            
                23.60
             | 
            
                23.60
             |                     
            
                17.25
             |                                 
            
                12,900
             |            
            
                 
             |                                       
         
    
        
            | 
                4/1/2008
             | 
            
                +0.40 / +1.75%
             |             
            
                23.20
             |           
            
                23.20
             |               
            
                23.20
             |                           
            
                23.20
             | 
            
                23.20
             |                     
            
                16.96
             |                                 
            
                12,600
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/31/2008
             | 
            
                0.00 / 0.00%
             |             
            
                22.80
             |           
            
                22.80
             |               
            
                22.80
             |                           
            
                22.80
             | 
            
                22.80
             |                     
            
                16.67
             |                                 
            
                2,100
             |            
            
                 
             |                                       
         
    
        
            | 
                3/28/2008
             | 
            
                +0.40 / +1.82%
             |             
            
                22.40
             |           
            
                22.40
             |               
            
                22.40
             |                           
            
                22.40
             | 
            
                22.40
             |                     
            
                16.38
             |                                 
            
                18,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/27/2008
             | 
            
                +0.10 / +0.46%
             |             
            
                21.90
             |           
            
                22.00
             |               
            
                21.90
             |                           
            
                22.00
             | 
            
                21.95
             |                     
            
                16.08
             |                                 
            
                4,300
             |            
            
                 
             |                                       
         
    
        
            | 
                3/26/2008
             | 
            
                +1.90 / +9.50%
             |             
            
                20.00
             |           
            
                22.20
             |               
            
                20.00
             |                           
            
                21.90
             | 
            
                21.65
             |                     
            
                16.01
             |                                 
            
                23,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/25/2008
             | 
            
                -3.00 / -13.04%
             |             
            
                20.10
             |           
            
                23.30
             |               
            
                20.00
             |                           
            
                20.00
             | 
            
                21.21
             |                     
            
                14.62
             |                                 
            
                23,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/24/2008
             | 
            
                0.00 / 0.00%
             |             
            
                23.50
             |           
            
                23.50
             |               
            
                21.90
             |                           
            
                23.00
             | 
            
                22.17
             |                     
            
                16.82
             |                                 
            
                8,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/21/2008
             | 
            
                -2.10 / -8.08%
             |             
            
                25.00
             |           
            
                25.50
             |               
            
                23.80
             |                           
            
                23.90
             | 
            
                24.31
             |                     
            
                17.47
             |                                 
            
                9,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/20/2008
             | 
            
                0.00 / 0.00%
             |             
            
                26.50
             |           
            
                26.50
             |               
            
                25.80
             |                           
            
                26.00
             | 
            
                26.45
             |                     
            
                19.01
             |                                 
            
                2,300
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/19/2008
             | 
            
                +0.20 / +0.78%
             |             
            
                26.70
             |           
            
                27.50
             |               
            
                23.90
             |                           
            
                26.00
             | 
            
                25.73
             |                     
            
                19.01
             |                                 
            
                15,000
             |            
            
                 
             |                                       
         
    
        
            | 
                3/18/2008
             | 
            
                -1.70 / -6.18%
             |             
            
                25.80
             |           
            
                29.00
             |               
            
                25.80
             |                           
            
                25.80
             | 
            
                26.54
             |                     
            
                18.86
             |                                 
            
                41,700
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/17/2008
             | 
            
                0.00 / 0.00%
             |             
            
                31.50
             |           
            
                31.50
             |               
            
                27.30
             |                           
            
                27.50
             | 
            
                28.58
             |                     
            
                20.11
             |                                 
            
                29,500
             |            
            
                 
             |                                       
         
    
        
            | 
                3/14/2008
             | 
            
                +0.80 / +2.67%
             |             
            
                32.00
             |           
            
                32.00
             |               
            
                29.00
             |                           
            
                30.80
             | 
            
                30.30
             |                     
            
                22.52
             |                                 
            
                9,900
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/13/2008
             | 
            
                -0.90 / -2.91%
             |             
            
                32.00
             |           
            
                32.00
             |               
            
                30.00
             |                           
            
                30.00
             | 
            
                30.25
             |                     
            
                21.93
             |                                 
            
                18,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/12/2008
             | 
            
                +0.30 / +0.98%
             |             
            
                32.00
             |           
            
                32.80
             |               
            
                30.00
             |                           
            
                30.90
             | 
            
                31.44
             |                     
            
                22.59
             |                                 
            
                8,400
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/11/2008
             | 
            
                -2.40 / -7.27%
             |             
            
                33.00
             |           
            
                34.20
             |               
            
                30.40
             |                           
            
                30.60
             | 
            
                31.27
             |                     
            
                22.37
             |                                 
            
                5,700
             |            
            
                 
             |                                       
         
    
        
            | 
                3/10/2008
             | 
            
                0.00 / 0.00%
             |             
            
                35.90
             |           
            
                35.90
             |               
            
                30.00
             |                           
            
                33.00
             | 
            
                33.69
             |                     
            
                24.13
             |                                 
            
                32,500
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/7/2008
             | 
            
                +2.60 / +8.64%
             |             
            
                32.70
             |           
            
                32.70
             |               
            
                32.70
             |                           
            
                32.70
             | 
            
                32.70
             |                     
            
                23.91
             |                                 
            
                16,900
             |            
            
                 
             |                                       
         
    
        
            | 
                3/6/2008
             | 
            
                +2.60 / +9.45%
             |             
            
                29.00
             |           
            
                30.10
             |               
            
                28.90
             |                           
            
                30.10
             | 
            
                29.84
             |                     
            
                22.01
             |                                 
            
                9,100
             |  
            
                 
             |                                                              
             
    
        			
            | 
                3/5/2008
             | 
            
                -1.90 / -6.46%
             |             
            
                31.00
             |           
            
                31.00
             |               
            
                26.60
             |                           
            
                27.50
             | 
            
                27.44
             |                     
            
                20.11
             |                                 
            
                27,800
             |            
            
                 
             |                                       
         
    
        
            | 
                3/4/2008
             | 
            
                -2.30 / -7.26%
             |             
            
                30.90
             |           
            
                30.90
             |               
            
                29.40
             |                           
            
                29.40
             | 
            
                29.46
             |                     
            
                21.50
             |                                 
            
                26,400
             |  
            
                 
             |                                                              
             
    
         
    
    
 |