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                    Closing price on 4/8/2010
                 |  |  
    
        |           
                
                    | Open | 43.00 |  
                    | High | 44.00 |  
                    | Low | 42.10 |  
                    | Volume | 347,900 |  
                    | Split-adjusted Price | 31.44 |  
                
             | 
 |  XMC Historical Quote 
            
                | Date | Change | Open | High | Low | Close | Average | Adjusted Close | Volume |  |  			
            | 4/8/2010 | +0.50 / +1.18% | 43.00 | 44.00 | 42.10 | 43.00 | 43.14 | 31.44 | 347,900 |   |  
            | 4/7/2010 | +1.00 / +2.41% | 42.00 | 42.50 | 41.00 | 42.50 | 41.82 | 31.07 | 348,000 |   |  			
            | 4/6/2010 | +0.10 / +0.24% | 43.40 | 43.40 | 40.60 | 41.50 | 41.70 | 30.34 | 227,000 |   |  
            | 4/5/2010 | 0.00 / 0.00% | 39.00 | 41.50 | 39.00 | 41.40 | 40.61 | 30.27 | 351,000 |   |  			
            | 4/2/2010 | +0.20 / +0.52% | 38.70 | 39.10 | 38.40 | 39.00 | 38.85 | 28.51 | 73,800 |   |  
            | 4/1/2010 | +0.30 / +0.78% | 38.40 | 38.90 | 37.50 | 38.80 | 38.31 | 28.37 | 93,400 |   |  			
            | 3/31/2010 | +0.20 / +0.52% | 38.90 | 38.90 | 37.90 | 38.50 | 38.18 | 28.15 | 44,000 |   |  
            | 3/30/2010 | -1.00 / -2.54% | 39.00 | 39.40 | 38.00 | 38.30 | 38.65 | 28.00 | 86,600 |   |  			
            | 3/29/2010 | 0.00 / 0.00% | 38.20 | 39.60 | 38.20 | 39.30 | 39.18 | 28.73 | 159,300 |   |  
            | 3/26/2010 | +0.80 / +2.11% | 38.70 | 39.00 | 38.00 | 38.80 | 38.36 | 28.37 | 91,800 |   |  			
            | 3/25/2010 | -1.50 / -3.80% | 38.60 | 39.30 | 37.70 | 38.00 | 38.24 | 27.78 | 120,300 |   |  
            | 3/24/2010 | +0.60 / +1.54% | 39.50 | 40.00 | 37.40 | 39.50 | 38.62 | 28.88 | 326,700 |   |  			
            | 3/23/2010 | -0.40 / -1.02% | 39.00 | 39.40 | 38.50 | 38.90 | 38.93 | 28.44 | 191,000 |   |  
            | 3/22/2010 | 0.00 / 0.00% | 40.70 | 40.80 | 38.80 | 39.30 | 39.48 | 28.73 | 134,200 |   |  			
            | 3/19/2010 | -2.90 / -6.76% | 42.00 | 42.50 | 40.00 | 40.00 | 40.90 | 29.25 | 178,600 |   |  
            | 3/18/2010 | +2.50 / +6.19% | 41.00 | 43.00 | 38.60 | 42.90 | 41.52 | 31.37 | 241,600 |   |  			
            | 3/17/2010 | -0.90 / -2.18% | 41.60 | 42.00 | 38.80 | 40.40 | 40.17 | 29.54 | 130,900 |   |  
            | 3/16/2010 | -2.00 / -4.62% | 41.70 | 43.60 | 40.70 | 41.30 | 41.64 | 30.20 | 216,900 |   |  			
            | 3/15/2010 | 0.00 / 0.00% | 42.90 | 43.90 | 41.60 | 43.30 | 43.63 | 31.66 | 530,500 |   |  
            | 3/12/2010 | +3.00 / +7.59% | 39.80 | 42.50 | 38.70 | 42.50 | 41.07 | 31.07 | 405,500 |   |  			
            | 3/11/2010 | -1.30 / -3.19% | 40.50 | 40.70 | 39.00 | 39.50 | 39.82 | 28.88 | 121,700 |   |  
            | 3/10/2010 | +0.40 / +0.99% | 40.90 | 42.00 | 39.60 | 40.80 | 40.29 | 29.83 | 184,300 |   |  			
            | 3/9/2010 | +2.50 / +6.60% | 37.80 | 40.40 | 37.80 | 40.40 | 39.96 | 29.54 | 446,700 |   |  
            | 3/8/2010 | 0.00 / 0.00% | 36.00 | 37.90 | 36.00 | 37.90 | 37.79 | 27.71 | 267,300 |   |  			
            | 3/5/2010 | +0.80 / +2.29% | 35.00 | 36.00 | 34.50 | 35.80 | 35.48 | 26.17 | 133,600 |   |  
            | 3/4/2010 | +0.10 / +0.29% | 35.00 | 36.10 | 34.00 | 35.00 | 35.60 | 25.59 | 132,000 |   |  			
            | 3/3/2010 | +2.90 / +9.06% | 33.10 | 35.00 | 33.10 | 34.90 | 33.79 | 25.52 | 182,300 |   |  
            | 3/2/2010 | -1.50 / -4.48% | 33.00 | 33.20 | 32.00 | 32.00 | 32.79 | 23.40 | 89,800 |   |  			
            | 3/1/2010 | 0.00 / 0.00% | 33.40 | 33.70 | 33.00 | 33.50 | 33.35 | 24.49 | 96,100 |   |  
            | 2/26/2010 | -0.40 / -1.18% | 33.50 | 33.60 | 33.00 | 33.50 | 33.43 | 24.49 | 22,100 |   |  |