|  
                Year  
            |  
         
             Beginning Price  
            |  
         
             Ending Price  
            |  
         
             Gain or Loss 
            |  
         
             Percent Gain or Loss  
            |  
      
|  
           2006 
            |  
         
           21.20 
            |  
         
           28.00 
            |  
         
           6.80 
            |  
         
           32.08% 
            |  
      
|  
           2007 
            |  
         
           28.00 
            |  
         
           36.59 
            |  
         
           8.59 
            |  
         
           30.68% 
            |  
      
|  
           2008 
            |  
         
           36.59 
            |  
         
           15.18 
            |  
         
           -21.41 
            |  
         
           -58.51% 
            |  
      
|  
           2009 
            |  
         
           15.18 
            |  
         
           21.86 
            |  
         
           6.68 
            |  
         
           44.01% 
            |  
      
|  
           2010 
            |  
         
           21.86 
            |  
         
           33.89 
            |  
         
           12.03 
            |  
         
           55.03% 
            |  
      
|  
           2011 
            |  
         
           33.89 
            |  
         
           39.52 
            |  
         
           5.63 
            |  
         
           16.61% 
            |  
      
|  
           2012 
            |  
         
           39.52 
            |  
         
           58.75 
            |  
         
           19.23 
            |  
         
           48.66% 
            |  
      
|  
           2013 
            |  
         
           58.75 
            |  
         
           84.32 
            |  
         
           25.57 
            |  
         
           43.52% 
            |  
      
|  
           2014 
            |  
         
           84.32 
            |  
         
           96.62* 
            |  
         
           12.30 
            |  
         
           14.59% 
            |  
      
|  
           2015 
            |  
         
           48.31 
            |  
         
           40.77 
            |  
         
           -7.54 
            |  
         
           -15.61% 
            |  
      
|  
           2016 
            |  
         
           40.77 
            |  
         
           32.43992* 
            |  
         
           -8.33008 
            |  
         
           -20.43% 
            |  
      
|  
           2017 
            |  
         
           29.70 
            |  
         
           33.84 
            |  
         
           4.14 
            |  
         
           13.94% 
            |  
      
|  
           2018 
            |  
         
           33.84 
            |  
         
           20.64 
            |  
         
           -13.20 
            |  
         
           -39.01% 
            |  
      
|  
           2019 
            |  
         
           20.64 
            |  
         
           21.795 
            |  
         
           1.155 
            |  
         
           5.60% 
            |  
      
|  
           2020 
            |  
         
           21.795 
            |  
         
           23.65 
            |  
         
           1.855 
            |  
         
           8.51% 
            |  
      
|  
           2021 
            |  
         
           23.65 
            |  
         
           28.09 
            |  
         
           4.44 
            |  
         
           18.77% 
            |  
      
|  
           2022 
            |  
         
           28.09 
            |  
         
           19.43 
            |  
         
           -8.66 
            |  
         
           -30.83% 
            |  
      
|  
           2023 
            |  
         
           19.43 
            |  
         
           18.64 
            |  
         
           -0.79 
            |  
         
           -4.07% 
            |  
      
|  
           2024 
            |  
         
           18.64 
            |  
         
           21.756* 
            |  
         
           3.116 
            |  
         
           16.72% 
            |