|  
                Year  
            |  
         
             Beginning Price  
            |  
         
             Ending Price  
            |  
         
             Gain or Loss 
            |  
         
             Percent Gain or Loss  
            |  
      
|  
           1981 
            |  
         
           52.125 
            |  
         
           41.125 
            |  
         
           -11.00 
            |  
         
           -21.10% 
            |  
      
|  
           1982 
            |  
         
           41.125 
            |  
         
           37.00 
            |  
         
           -4.125 
            |  
         
           -10.03% 
            |  
      
|  
           1983 
            |  
         
           37.00 
            |  
         
           40.125 
            |  
         
           3.125 
            |  
         
           8.45% 
            |  
      
|  
           1984 
            |  
         
           40.125 
            |  
         
           27.125 
            |  
         
           -13.00 
            |  
         
           -32.40% 
            |  
      
|  
           1985 
            |  
         
           27.125 
            |  
         
           27.25 
            |  
         
           0.125 
            |  
         
           0.46% 
            |  
      
|  
           1986 
            |  
         
           27.25 
            |  
         
           29.75 
            |  
         
           2.50 
            |  
         
           9.17% 
            |  
      
|  
           1987 
            |  
         
           29.75 
            |  
         
           26.00 
            |  
         
           -3.75 
            |  
         
           -12.61% 
            |  
      
|  
           1988 
            |  
         
           26.00 
            |  
         
           27.00 
            |  
         
           1.00 
            |  
         
           3.85% 
            |  
      
|  
           1989 
            |  
         
           27.00 
            |  
         
           33.125 
            |  
         
           6.125 
            |  
         
           22.69% 
            |  
      
|  
           1990 
            |  
         
           33.125 
            |  
         
           19.875 
            |  
         
           -13.25 
            |  
         
           -40.00% 
            |  
      
|  
           1991 
            |  
         
           19.875 
            |  
         
           26.875 
            |  
         
           7.00 
            |  
         
           35.22% 
            |  
      
|  
           1992 
            |  
         
           26.875 
            |  
         
           33.50 
            |  
         
           6.625 
            |  
         
           24.65% 
            |  
      
|  
           1993 
            |  
         
           33.50 
            |  
         
           45.50 
            |  
         
           12.00 
            |  
         
           35.82% 
            |  
      
|  
           1994 
            |  
         
           45.50 
            |  
         
           42.50 
            |  
         
           -3.00 
            |  
         
           -6.59% 
            |  
      
|  
           1995 
            |  
         
           42.50 
            |  
         
           54.625 
            |  
         
           12.125 
            |  
         
           28.53% 
            |  
      
|  
           1996 
            |  
         
           54.625 
            |  
         
           68.625 
            |  
         
           14.00 
            |  
         
           25.63% 
            |  
      
|  
           1997 
            |  
         
           68.625 
            |  
         
           91.75* 
            |  
         
           23.125 
            |  
         
           33.70% 
            |  
      
|  
           1998 
            |  
         
           45.875 
            |  
         
           36.625 
            |  
         
           -9.25 
            |  
         
           -20.16% 
            |  
      
|  
           1999 
            |  
         
           36.625 
            |  
         
           26.6875 
            |  
         
           -9.9375 
            |  
         
           -27.13% 
            |  
      
|  
           2000 
            |  
         
           26.6875 
            |  
         
           30.625 
            |  
         
           3.3975 
            |  
         
           14.75% 
            |  
      
|  
           2001 
            |  
         
           30.625 
            |  
         
           30.51 
            |  
         
           -0.115 
            |  
         
           -0.38% 
            |  
      
|  
           2002 
            |  
         
           30.51 
            |  
         
           26.30 
            |  
         
           -4.21 
            |  
         
           -13.80% 
            |  
      
|  
           2003 
            |  
         
           26.30 
            |  
         
           37.95 
            |  
         
           11.65 
            |  
         
           44.30% 
            |  
      
|  
           2004 
            |  
         
           37.95 
            |  
         
           61.79 
            |  
         
           23.84 
            |  
         
           62.82% 
            |  
      
|  
           2005 
            |  
         
           61.79 
            |  
         
           86.02* 
            |  
         
           24.23 
            |  
         
           39.21% 
            |  
      
|  
           2006 
            |  
         
           43.01 
            |  
         
           45.86 
            |  
         
           2.85 
            |  
         
           6.63% 
            |  
      
|  
           2007 
            |  
         
           45.86 
            |  
         
           62.68 
            |  
         
           16.82 
            |  
         
           36.68% 
            |  
      
|  
           2008 
            |  
         
           62.68 
            |  
         
           38.05 
            |  
         
           -24.63 
            |  
         
           -39.29% 
            |  
      
|  
           2009 
            |  
         
           38.05 
            |  
         
           47.55 
            |  
         
           9.50 
            |  
         
           24.97% 
            |  
      
|  
           2010 
            |  
         
           47.55 
            |  
         
           45.30 
            |  
         
           -2.25 
            |  
         
           -4.73% 
            |  
      
|  
           2011 
            |  
         
           45.30 
            |  
         
           36.04 
            |  
         
           -9.26 
            |  
         
           -20.44% 
            |  
      
|  
           2012 
            |  
         
           36.04 
            |  
         
           48.96 
            |  
         
           12.92 
            |  
         
           35.85% 
            |  
      
|  
           2013 
            |  
         
           48.96 
            |  
         
           69.81 
            |  
         
           20.85 
            |  
         
           42.59% 
            |  
      
|  
           2014 
            |  
         
           69.81 
            |  
         
           71.82 
            |  
         
           2.01 
            |  
         
           2.88% 
            |  
      
|  
           2015 
            |  
        
           71.82 
            |  
         
           86.90 
            |  
         
           15.08 
            |  
         
           21.00% 
            |  
      
|  
           2016 
            |  
        
           86.90 
            |  
         
           102.47 
            |  
         
           15.57 
            |  
         
           17.92% 
            |  
      
|  
           2017 
            |  
        
           102.47 
            |  
         
           141.65 
            |  
         
           39.18 
            |  
         
           38.24% 
            |  
      
|  
           2018 
            |  
         
           141.65 
            |  
         
           134.65 
            |  
         
           -7.00 
            |  
         
           -4.94% 
            |  
      
|  
           2019 
            |  
         
           134.65 
            |  
         
           197.87 
            |  
        
           63.22 
            |  
         
           46.95% 
            |  
      
|  
           2020 
            |  
         
           197.87 
            |  
         
           189.02 
            |  
         
           -8.85 
            |  
         
           -4.47% 
            |  
      
|  
           2021 
            |  
         
           189.02 
            |  
         
           213.24 
            |  
         
           24.22 
            |  
         
           12.81% 
            |  
      
|  
           2022 
            |  
         
           213.24 
            |  
         
           208.21 
            |  
         
           -5.03 
            |  
         
           -2.36% 
            |  
      
|  
           2023 
            |  
         
           208.21 
            |  
         
           210.62 
            |  
         
           2.41 
            |  
         
           1.16% 
            |  
      
|  
           2024 
            |  
         
           210.62 
            |  
         
           210.28 
            |  
         
           -0.34 
            |  
         
           -0.16% 
            |