|  
                Year  
            |  
         
             Beginning Price  
            |  
         
             Ending Price  
            |  
         
             Gain or Loss 
            |  
         
             Percent Gain or Loss  
            |  
      
|  
           2007 
            |  
         
           17.79 
            |  
         
           20.12 
            |  
         
           2.33 
            |  
         
           13.10% 
            |  
      
|  
           2008 
            |  
         
           20.12 
            |  
         
           19.48 
            |  
         
           -0.64 
            |  
         
           -3.18% 
            |  
      
|  
           2009 
            |  
         
           19.48 
            |  
         
           18.94 
            |  
         
           -0.54 
            |  
         
           -2.77% 
            |  
      
|  
           2010 
            |  
         
           18.94 
            |  
         
           15.86 
            |  
         
           -3.08 
            |  
         
           -16.26% 
            |  
      
|  
           2011 
            |  
         
           15.86 
            |  
         
           12.29 
            |  
         
           -3.57 
            |  
         
           -22.51% 
            |  
      
|  
           2012 
            |  
         
           12.29 
            |  
         
           11.32 
            |  
         
           -0.97 
            |  
         
           -7.89% 
            |  
      
|  
           2013 
            |  
         
           11.32 
            |  
         
           16.34679* 
            |  
         
           5.02679 
            |  
         
           44.41% 
            |  
      
|  
           2014 
            |  
         
           46.49 
            |  
         
           43.52 
            |  
         
           -2.97 
            |  
         
           -6.39% 
            |  
      
|  
           2015 
            |  
        
           43.52 
            |  
         
           56.26 
            |  
         
           12.74 
            |  
         
           29.27% 
            |  
      
|  
           2016 
            |  
         
           56.26 
            |  
         
           51.14 
            |  
         
           -5.12 
            |  
         
           -9.10% 
            |  
      
|  
           2017 
            |  
        
           51.14 
            |  
         
           64.57 
            |  
         
           13.43 
            |  
         
           26.26% 
            |  
      
|  
           2018 
            |  
         
           64.57 
            |  
         
           52.72 
            |  
         
           -11.85 
            |  
         
           -18.35% 
            |  
      
|  
           2019 
            |  
         
           52.72 
            |  
         
           97.89 
            |  
         
           45.17 
            |  
         
           85.68% 
            |  
      
|  
           2020 
            |  
         
           97.89 
            |  
         
           105.12 
            |  
         
           7.23 
            |  
         
           7.39% 
            |  
      
|  
           2021 
            |  
         
           105.12 
            |  
         
           88.90 
            |  
         
           -16.22 
            |  
         
           -15.43% 
            |  
      
|  
           2022 
            |  
         
           88.90 
            |  
         
           105.19 
            |  
         
           16.29 
            |  
         
           18.32% 
            |  
      
|  
           2023 
            |  
         
           105.19 
            |  
         
           108.24 
            |  
         
           3.05 
            |  
         
           2.90% 
            |  
      
|  
           2024 
            |  
         
           108.24 
            |  
         
           144.06 
            |  
         
           35.82 
            |  
         
           33.09% 
            |