|  
                Year  
            |  
         
             Beginning Price  
            |  
         
             Ending Price  
            |  
         
             Gain or Loss 
            |  
         
             Percent Gain or Loss  
            |  
      
|  
           2002 
            |  
         
           34.15 
            |  
         
           33.50 
            |  
         
           -0.65 
            |  
         
           -1.90% 
            |  
      
|  
           2003 
            |  
         
           33.50 
            |  
         
           41.72 
            |  
         
           8.22  |  
         
           24.54% 
            |  
      
|  
           2004 
            |  
         
           41.72 
            |  
         
           39.18 
            |  
         
           -2.54 
            |  
         
           -6.09% 
            |  
      
|  
           2005 
            |  
         
           39.18 
            |  
         
           37.98 
            |  
         
           -1.20 
            |  
         
           -3.06% 
            |  
      
|  
           2006 
            |  
         
           37.98 
            |  
         
           43.44 
            |  
         
           5.46 
            |  
         
           14.38% 
            |  
      
|  
           2007 
            |  
         
           43.44 
            |  
         
           41.57 
            |  
         
           -1.87 
            |  
         
           -4.30% 
            |  
      
|  
           2008 
            |  
         
           41.57 
            |  
         
           13.28 
            |  
         
           -28.29 
            |  
         
           -68.05% 
            |  
      
|  
           2009 
            |  
         
           13.28 
            |  
         
           23.42 
            |  
         
           10.14 
            |  
         
           76.36% 
            |  
      
|  
           2010 
            |  
         
           23.42 
            |  
         
           41.52 
            |  
         
           18.10 
            |  
         
           77.28% 
            |  
      
|  
           2011 
            |  
         
           41.52 
            |  
         
           34.41 
            |  
         
           -7.11 
            |  
         
           -17.12% 
            |  
      
|  
           2012 
            |  
         
           34.41 
            |  
         
           46.68 
            |  
         
           12.27 
            |  
         
           35.66% 
            |  
      
|  
           2013 
            |  
         
           46.68 
            |  
         
           48.00** 
            |  
         
           1.32 
            |  
         
           2.83% 
            |