|  
                Year  
            |  
         
             Beginning Price  
            |  
         
             Ending Price  
            |  
         
             Gain or Loss 
            |  
         
             Percent Gain or Loss  
            |  
      
|  
           2007 
            |  
         
           14.98 
            |  
         
           14.05 
            |  
         
           -0.93 
            |  
         
           -6.21% 
            |  
      
|  
           2008 
            |  
         
           14.05 
            |  
         
           6.82 
            |  
         
           -7.23 
            |  
         
           -51.46% 
            |  
      
|  
           2009 
            |  
         
           6.82 
            |  
         
           9.93 
            |  
         
           3.11 
            |  
         
           45.60% 
            |  
      
|  
           2010 
            |  
         
           9.93 
            |  
         
           11.11 
            |  
         
           1.18 
            |  
         
           11.88% 
            |  
      
|  
           2011 
            |  
         
           11.11 
            |  
         
           18.28 
            |  
         
           7.17 
            |  
         
           64.54% 
            |  
      
|  
           2012 
            |  
         
           18.28 
            |  
         
           19.8067** 
            |  
         
           1.5267 
            |  
         
           8.35% 
            |