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                    Closing price on 8/20/2008
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        |           
                
                    | Open | 14.50 |  
                    | High | 14.50 |  
                    | Low | 14.00 |  
                    | Volume | 43,100 |  
                    | Split-adjusted Price | 10.24 |  
                
             | 
 |  XMC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 8/20/2008 | -0.70 / -4.76% | 14.50 | 14.50 | 14.00 | 14.00 | 14.12 | 10.24 | 43,100 |   |  
            | 8/19/2008 | -1.00 / -6.37% | 15.90 | 15.90 | 14.70 | 14.70 | 14.99 | 10.75 | 29,700 |   |  			
            | 8/18/2008 | 0.00 / 0.00% | 15.60 | 15.90 | 15.50 | 15.70 | 15.76 | 11.48 | 51,800 |   |  
            | 8/15/2008 | +0.40 / +2.70% | 15.20 | 15.20 | 15.20 | 15.20 | 15.20 | 11.11 | 43,700 |   |  			
            | 8/14/2008 | +0.50 / +3.50% | 14.20 | 14.80 | 14.20 | 14.80 | 14.69 | 10.82 | 44,100 |   |  
            | 8/13/2008 | -0.40 / -2.72% | 14.20 | 14.90 | 14.10 | 14.30 | 14.34 | 10.46 | 28,800 |   |  			
            | 8/12/2008 | +0.40 / +2.80% | 14.70 | 14.70 | 13.70 | 14.70 | 14.63 | 10.75 | 89,500 |   |  
            | 8/11/2008 | 0.00 / 0.00% | 14.30 | 14.30 | 13.90 | 14.30 | 14.23 | 10.46 | 43,100 |   |  			
            | 8/8/2008 | +0.40 / +2.96% | 13.70 | 14.00 | 13.20 | 13.90 | 13.76 | 10.16 | 15,500 |   |  
            | 8/7/2008 | -0.10 / -0.74% | 13.70 | 13.80 | 13.20 | 13.50 | 13.72 | 9.87 | 31,300 |   |  			
            | 8/6/2008 | +0.60 / +4.62% | 13.40 | 13.60 | 12.60 | 13.60 | 13.34 | 9.94 | 42,100 |   |  
            | 8/5/2008 | -0.30 / -2.26% | 13.80 | 13.80 | 13.00 | 13.00 | 13.10 | 9.50 | 27,900 |   |  			
            | 8/4/2008 | 0.00 / 0.00% | 13.70 | 13.90 | 13.20 | 13.30 | 13.53 | 9.72 | 22,000 |   |  
            | 8/1/2008 | -0.40 / -2.88% | 13.90 | 14.00 | 13.50 | 13.50 | 13.67 | 9.87 | 34,500 |   |  			
            | 7/31/2008 | +0.50 / +3.73% | 14.00 | 14.00 | 13.20 | 13.90 | 13.54 | 10.16 | 38,400 |   |  
            | 7/30/2008 | -0.10 / -0.74% | 14.00 | 14.10 | 13.20 | 13.40 | 13.68 | 9.80 | 29,700 |   |  			
            | 7/29/2008 | +0.30 / +2.27% | 13.90 | 13.90 | 13.00 | 13.50 | 13.71 | 9.87 | 59,800 |   |  
            | 7/28/2008 | 0.00 / 0.00% | 12.90 | 13.90 | 12.90 | 13.20 | 13.43 | 9.65 | 63,600 |   |  			
            | 7/25/2008 | -0.40 / -2.90% | 13.40 | 13.40 | 13.40 | 13.40 | 13.40 | 9.80 | 5,100 |   |  
            | 7/24/2008 | -0.50 / -3.50% | 13.80 | 14.80 | 13.80 | 13.80 | 13.94 | 10.09 | 77,100 |   |  			
            | 7/23/2008 | -0.50 / -3.38% | 14.30 | 14.30 | 14.30 | 14.30 | 14.30 | 10.46 | 200 |   |  
            | 7/22/2008 | -0.60 / -3.90% | 14.80 | 14.80 | 14.80 | 14.80 | 14.80 | 10.82 | 600 |   |  			
            | 7/21/2008 | 0.00 / 0.00% | 15.40 | 15.40 | 15.40 | 15.40 | 15.40 | 11.26 | 1,300 |   |  
            | 7/18/2008 | -0.40 / -2.44% | 16.00 | 16.00 | 16.00 | 16.00 | 16.00 | 11.70 | 9,600 |   |  			
            | 7/17/2008 | -0.60 / -3.53% | 16.50 | 17.10 | 16.10 | 16.40 | 16.56 | 11.99 | 60,800 |   |  
            | 7/16/2008 | +0.50 / +3.03% | 17.10 | 17.10 | 15.90 | 17.00 | 16.53 | 12.43 | 83,000 |   |  			
            | 7/15/2008 | +0.50 / +3.13% | 16.50 | 16.50 | 16.50 | 16.50 | 16.50 | 12.06 | 25,100 |   |  
            | 7/14/2008 | 0.00 / 0.00% | 15.80 | 16.00 | 15.50 | 16.00 | 15.92 | 11.70 | 53,100 |   |  			
            | 7/11/2008 | +0.30 / +1.99% | 15.40 | 15.80 | 15.10 | 15.40 | 15.38 | 11.26 | 64,100 |   |  
            | 7/10/2008 | -0.50 / -3.21% | 16.00 | 16.00 | 15.10 | 15.10 | 15.71 | 11.04 | 37,200 |   |  |