|  
                Year  
            |  
         
             Beginning Price  
            |  
         
             Ending Price  
            |  
         
             Gain or Loss 
            |  
         
             Percent Gain or Loss  
            |  
      
|  
           2000 
            |  
         
           60.00 
            |  
         
           86.375 
            |  
         
           26.375 
            |  
         
           43.96% 
            |  
      
|  
           2001 
            |  
         
           86.375 
            |  
         
           61.93 
              
           |  
         
           -24.445 
            |  
         
           -28.30% 
            |  
      
|  
           2002 
            |  
         
           61.93 
            |  
         
           31.29 
              
           |  
         
           -30.64 
            |  
         
           -49.48% 
            |  
      
|  
           2003 
            |  
         
           31.29 
            |  
         
           69.91 
            |  
         
           38.62 
            |  
         
           123.43% 
            |  
      
|  
           2004 
            |  
         
           69.91 
            |  
         
           67.13 
              
           |  
         
           -2.78 
            |  
         
           -3.98% 
            |  
      
|  
           2005 
            |  
         
           67.13 
            |  
         
           66.64 
            |  
         
           -0.49 
            |  
         
           -0.73% 
            |  
      
|  
           2006 
            |  
         
           66.64 
            |  
         
           56.59 
              
           |  
         
           -10.05 
            |  
         
           -15.08% 
            |  
      
|  
           2007 
            |  
         
           56.59 
            |  
         
           93.41 
            |  
         
           36.82 
            |  
         
           65.06% 
            |  
      
|  
           2008 
            |  
         
           93.41 
            |  
         
           46.62* 
            |  
         
           -46.79 
            |  
         
           -50.09% 
                
           |  
      
|  
           2009 
            |  
         
           23.31 
            |  
         
           52.22 
            |  
         
           28.91 
            |  
         
           124.02% 
            |  
      
|  
           2010 
            |  
         
           52.22 
            |  
         
           55.50 
            |  
         
           3.28 
            |  
         
           6.28% 
            |  
      
|  
           2011 
            |  
         
           55.50 
            |  
         
           38.91 
            |  
         
           -16.59 
            |  
         
           -29.89% 
            |  
      
|  
           2012 
            |  
         
           38.91 
            |  
         
           49.03 
            |  
         
           10.12 
            |  
         
           26.01% 
            |  
      
|  
           2013 
            |  
         
           49.03 
            |  
         
           75.80 
            |  
         
           26.77 
            |  
         
           54.60% 
            |  
      
|  
           2014 
            |  
         
           75.80 
            |  
         
           76.13** 
            |  
         
           0.33 
            |  
         
           0.44% 
            |