|  
                Year  
            |  
         
             Beginning Price  
            |  
         
             Ending Price  
            |  
         
             Gain or Loss 
            |  
         
             Percent Gain or Loss  
            |  
      
|  
           1975 
            |  
         
           4.00 
            |  
         
           9.625 
            |  
         
           5.625 
            |  
         
           140.63% 
            |  
      
|  
           1976 
            |  
         
           9.625 
            |  
         
           17.25 
            |  
         
           7.625 
            |  
         
           79.22% 
            |  
      
|  
           1977 
            |  
         
           17.25 
            |  
         
           31.5625 
            |  
         
           14.3125 
            |  
         
           82.97% 
            |  
      
|  
           1978 
            |  
         
           31.5625 
            |  
         
           28.50* 
            |  
         
           -3.0625 
            |  
         
           -9.70% 
            |  
      
|  
           1979 
            |  
         
           19.00 
            |  
         
           12.75 
            |  
         
           -6.25 
            |  
         
           -32.89% 
            |  
      
|  
           1980 
            |  
         
           12.75 
            |  
         
           12.125 
            |  
         
           -0.625 
            |  
         
           -4.90% 
            |  
      
|  
           1981 
            |  
         
           12.125 
            |  
         
           15.25 
            |  
         
           3.125 
            |  
         
           25.77% 
            |  
      
|  
           1982 
            |  
         
           15.25 
            |  
         
           23.75 
            |  
         
           8.50 
            |  
         
           55.74% 
            |  
      
|  
           1983 
            |  
         
           23.75 
            |  
         
           27.00* 
            |  
         
           3.25 
            |  
         
           13.68% 
            |  
      
|  
           1984 
            |  
         
           18.00 
            |  
         
           15.50 
            |  
         
           -2.50 
            |  
         
           -13.89% 
            |  
      
|  
           1985 
            |  
         
           15.50 
            |  
         
           17.75 
            |  
         
           2.25 
            |  
         
           14.52% 
            |  
      
|  
           1986 
            |  
         
           17.75 
            |  
         
           23.75* 
            |  
         
           6.00 
            |  
         
           33.80% 
            |  
      
|  
           1987 
            |  
         
           19.00 
            |  
         
           19.25* 
            |  
         
           0.25 
            |  
         
           1.32% 
            |  
      
|  
           1988 
            |  
         
           17.50 
            |  
         
           18.75 
            |  
         
           1.25 
            |  
         
           7.14% 
            |  
      
|  
           1989 
            |  
         
           18.75 
            |  
         
           25.00 
            |  
         
           6.25 
            |  
         
           33.33% 
            |  
      
|  
           1990 
            |  
         
           25.00 
            |  
         
           16.75 
            |  
         
           -8.25 
            |  
         
           -33.00% 
            |  
      
|  
           1991 
            |  
         
           16.75 
            |  
         
           39.50 
            |  
         
           22.75 
            |  
         
           135.82% 
            |  
      
|  
           1992 
            |  
         
           39.50 
            |  
         
           59.25* 
            |  
         
           19.75 
            |  
         
           50.00% 
            |  
      
|  
           1993 
            |  
         
           39.50 
            |  
         
           61.3333* 
            |  
         
           21.8333 
            |  
         
           55.27% 
            |  
      
|  
           1994 
            |  
         
           46.00 
            |  
         
           39.1667* 
            |  
         
           -6.8333 
            |  
         
           -14.86% 
            |  
      
|  
           1995 
            |  
         
           29.375 
            |  
         
           37.25 
            |  
         
           7.875 
            |  
         
           26.81% 
            |  
      
|  
           1996 
            |  
         
           37.25 
            |  
         
           46.00 
            |  
         
           8.75 
            |  
         
           23.49% 
            |  
      
|  
           1997 
            |  
         
           46.00 
            |  
         
           56.375 
            |  
         
           10.375 
            |  
         
           22.55% 
            |  
      
|  
           1998 
            |  
         
           56.375 
            |  
         
           48.1875* 
            |  
         
           -8.1875 
            |  
         
           -14.52% 
            |  
      
|  
           1999 
            |  
         
           32.125 
            |  
         
           33.125 
            |  
         
           1.00 
            |  
         
           3.11% 
            |  
      
|  
           2000 
            |  
         
           33.125 
            |  
         
           28.0625 
            |  
         
           -5.0625 
            |  
         
           -15.28% 
            |  
      
|  
           2001 
            |  
         
           28.0625 
            |  
         
           35.51 
            |  
         
           7.4475 
            |  
         
           26.54% 
            |  
      
|  
           2002 
            |  
         
           35.51 
            |  
         
           39.08 
            |  
         
           3.57 
            |  
         
           10.05% 
            |  
      
|  
           2003 
            |  
         
           39.08 
            |  
         
           45.16 
            |  
         
           6.08 
            |  
         
           15.56% 
            |  
      
|  
           2004 
            |  
         
           45.16 
            |  
         
           42.87 
            |  
         
           -2.29 
            |  
         
           -5.07% 
            |  
      
|  
           2005 
            |  
         
           42.87 
            |  
         
           37.05 
            |  
         
           -5.82 
            |  
         
           -13.58% 
            |  
      
|  
           2006 
            |  
         
           37.05 
            |  
         
           44.31 
            |  
         
           7.26 
            |  
         
           19.60% 
            |  
      
|  
           2007 
            |  
         
           44.31 
            |  
         
           39.70 
            |  
         
           -4.61 
            |  
         
           -10.40% 
            |  
      
|  
           2008 
            |  
         
           39.70 
            |  
         
           34.30 
            |  
         
           -5.40 
            |  
         
           -13.60% 
            |  
      
|  
           2009 
            |  
         
           34.30 
            |  
         
           49.68 
            |  
         
           15.38 
            |  
         
           44.84% 
            |  
      
|  
           2010 
            |  
         
           49.68 
            |  
         
           57.20 
            |  
         
           7.52 
            |  
         
           15.14% 
            |  
      
|  
           2011 
            |  
         
           57.20 
            |  
         
           69.34 
            |  
         
           12.14 
            |  
         
           21.22% 
            |  
      
|  
           2012 
            |  
         
           69.34 
            |  
         
           69.19 
            |  
         
           -0.15 
            |  
         
           -0.22% 
            |  
      
|  
           2013 
            |  
         
           69.19 
            |  
         
           88.15 
            |  
         
           18.96 
            |  
         
           27.40% 
            |  
      
|  
           2014 
            |  
         
           88.15 
            |  
         
           93.64 
            |  
         
           5.49 
            |  
         
           6.23% 
            |  
      
|  
           2015 
            |  
        
           93.64 
            |  
         
           115.46 
            |  
         
           21.82 
            |  
         
           23.30% 
            |  
      
|  
           2016 
            |  
        
           115.46 
            |  
         
           141.39 
            |  
         
           25.93 
            |  
         
           22.46% 
            |  
      
|  
           2017 
            |  
         
           141.39 
            |  
         
           129.21 
            |  
         
           -12.18 
            |  
         
           -8.61% 
            |  
      
|  
           2018 
            |  
        
           129.21 
            |  
         
           176.86 
            |  
         
           47.65 
            |  
         
           36.88% 
            |  
      
|  
           2019 
            |  
        
           176.86 
            |  
         
           160.10 
            |  
         
           -16.76 
            |  
         
           -9.48% 
            |  
      
|  
           2020 
            |  
        
           160.10 
            |  
         
           183.73 
            |  
         
           23.63 
            |  
         
           14.76% 
            |  
      
|  
           2021 
            |  
        
           183.73 
            |  
         
           165.60 
            |  
         
           -18.13 
            |  
         
           -9.87% 
            |  
      
|  
           2022 
            |  
        
           165.60 
            |  
         
           197.30 
            |  
         
           31.70 
            |  
         
           19.14% 
            |  
      
|  
           2023 
            |  
        
           197.30 
            |  
         
           166.39 
            |  
         
           -30.91 
            |  
         
           -15.67% 
            |  
      
|  
           2024 
            |  
        
           166.39 
            |  
         
           173.14 
            |  
         
           6.75 
            |  
         
           4.06% 
            |