|  
                Year  
            |  
         
             Beginning Price  
            |  
         
             Ending Price  
            |  
         
             Gain or Loss 
            |  
         
             Percent Gain or Loss  
            |  
      
|  
           2006 
            |  
         
           17.43 
            |  
         
           28.51 
            |  
         
           11.08 
            |  
         
           63.57% 
            |  
      
|  
           2007 
            |  
         
           28.51 
            |  
         
           24.98 
            |  
         
           -3.53 
            |  
         
           -12.38% 
            |  
      
|  
           2008 
            |  
         
           24.98 
            |  
         
           36.00 
            |  
         
           11.02 
            |  
         
           44.12% 
            |  
      
|  
           2009 
            |  
         
           36.00 
            |  
         
           33.61 
            |  
         
           -2.39 
            |  
         
           -6.64% 
            |  
      
|  
           2010 
            |  
         
           33.61 
            |  
         
           30.00 
            |  
         
           -3.61 
            |  
         
           -10.74% 
            |  
      
|  
           2011 
            |  
         
           30.00 
            |  
         
           12.83 
            |  
         
           -17.17 
            |  
         
           -57.23% 
            |  
      
|  
           2012 
            |  
         
           12.83 
            |  
         
           21.30 
            |  
         
           8.47 
            |  
         
           66.02% 
            |  
      
|  
           2013 
            |  
         
           21.30 
            |  
         
           24.04 
            |  
         
           2.74 
            |  
         
           12.86% 
            |  
      
|  
           2014 
            |  
         
           24.04 
            |  
         
           31.18 
            |  
         
           7.14 
            |  
         
           29.70% 
            |  
      
|  
           2015 
            |  
        
           31.18 
            |  
         
           45.29 
            |  
         
           14.11 
            |  
         
           45.25% 
            |  
      
|  
           2016 
            |  
        
           45.29 
            |  
         
           45.70 
            |  
         
           0.41 
            |  
         
           0.91% 
            |  
      
|  
           2017 
            |  
        
           45.70 
            |  
         
           61.25 
            |  
         
           15.55 
            |  
         
           34.03% 
            |  
      
|  
           2018 
            |  
        
           61.25 
            |  
         
           93.88 
            |  
         
           32.63 
            |  
         
           53.27% 
            |  
      
|  
           2019 
            |  
        
           93.88 
            |  
         
           137.76 
            |  
         
           43.88 
            |  
         
           46.74% 
            |  
      
|  
           2020 
            |  
        
           137.76 
            |  
         
           213.32 
            |  
         
           75.56 
            |  
         
           54.85% 
            |  
      
|  
           2021 
            |  
        
           213.32 
            |  
         
           137.23 
            |  
         
           -76.09 
            |  
         
           -35.67% 
            |  
      
|  
           2022 
            |  
        
           137.23 
            |  
         
           161.69 
            |  
         
           24.46 
            |  
         
           17.82% 
            |  
      
|  
           2023 
            |  
        
           161.69 
            |  
         
           170.00* 
            |  
         
           8.31 
            |  
         
           5.14% 
            |