|  
                Year  
            |  
         
             Beginning Price  
            |  
         
             Ending Price  
            |  
         
             Gain or Loss 
            |  
         
             Percent Gain or Loss  
            |  
      
|  
           1975 
            |  
         
           25.75 
            |  
         
           33.50 
              
           |  
         
           7.75 
            |  
         
           30.10% 
            |  
      
|  
           1976 
            |  
         
           33.50 
            |  
         
           40.25 
              
           |  
         
           6.75 
            |  
         
           20.15% 
            |  
      
|  
           1977 
            |  
         
           40.25 
            |  
         
           37.00 
              
           |  
         
           -3.25 
            |  
         
           -8.07% 
            |  
      
|  
           1978 
            |  
         
           37.00 
            |  
         
           41.625 
              
           |  
         
           4.625 
            |  
         
           12.50% 
            |  
      
|  
           1979 
            |  
         
           41.625 
            |  
         
           42.00 
                
           |  
         
           0.375 
            |  
         
           0.90% 
            |  
      
|  
           1980 
            |  
         
           42.00 
            |  
         
           51.00 
                
           |  
         
           9.00 
            |  
         
           21.43% 
            |  
      
|  
           1981 
            |  
         
           51.00 
            |  
         
           58.00 
                
           |  
         
           7.00 
            |  
         
           13.73% 
            |  
      
|  
           1982 
            |  
         
           58.00 
            |  
         
           52.50 
                
           |  
         
           -5.50 
            |  
         
           -9.48% 
            |  
      
|  
           1983 
            |  
         
           52.50 
            |  
         
           74.50 
                
           |  
         
           22.00 
            |  
         
           41.90% 
            |  
      
|  
           1984 
            |  
         
           74.50 
            |  
         
           70.75* 
              
           |  
         
           -3.75 
            |  
         
           -5.03% 
            |  
      
|  
           1985 
            |  
         
           35.375 
            |  
         
           40.75 
              
           |  
         
           5.375 
            |  
         
           15.19% 
            |  
      
|  
           1986 
            |  
         
           40.75 
            |  
         
           43.125 
              
           |  
         
           2.375 
            |  
         
           5.83% 
            |  
      
|  
           1987 
            |  
         
           43.125 
            |  
         
           52.00 
              
           |  
         
           8.875 
            |  
         
           20.58% 
            |  
      
|  
           1988 
            |  
         
           52.00 
            |  
         
           47.25 
              
           |  
         
           -4.75 
            |  
         
           -9.13% 
            |  
      
|  
           1989 
            |  
         
           47.25 
            |  
         
           49.875 
              
           |  
         
           2.625 
            |  
         
           5.56% 
            |  
      
|  
           1990 
            |  
         
           49.875 
            |  
         
           47.25 
                
             |  
         
           -2.625 
            |  
         
           -5.26% 
            |  
      
|  
           1991 
            |  
         
           47.25 
            |  
         
           57.50 
              
           |  
         
           10.25 
            |  
         
           21.69% 
            |  
      
|  
           1992 
            |  
         
           57.50 
            |  
         
           65.50 
              
           |  
         
           8.00 
            |  
         
           13.91% 
            |  
      
|  
           1993 
            |  
         
           65.50 
            |  
         
           58.50 
              
           |  
         
           -7.00 
            |  
         
           -10.69% 
            |  
      
|  
           1994 
            |  
         
           58.50 
            |  
         
           67.125 
              
           |  
         
           8.625 
            |  
         
           14.74% 
            |  
      
|  
           1995 
            |  
         
           67.125 
            |  
         
           73.75 
              
           |  
         
           6.625 
                  
             |  
         
           9.87% 
            |  
      
|  
           1996 
            |  
         
           73.75 
            |  
         
           88.75* 
              
           |  
         
           15.00 
            |  
         
           20.34% 
            |  
      
|  
           1997 
            |  
         
           44.375 
            |  
         
           47.25 
              
           |  
         
           2.875 
            |  
         
           6.48% 
            |  
      
|  
           1998 
            |  
         
           47.25 
            |  
         
           43.3125 
              
           |  
         
           -3.9375 
            |  
         
           -8.33% 
            |  
      
|  
           1999 
            |  
         
           43.3125 
            |  
         
           31.875 
              
           |  
         
           -11.4375 
            |  
         
           -26.41% 
            |  
      
|  
           2000 
            |  
         
           31.875 
            |  
         
           16.1875 
              
           |  
         
           -15.6875 
                  
             |  
         
           -49.22% 
            |  
      
|  
           2001 
            |  
         
           16.1875 
            |  
         
           21.15 
              
           |  
         
           4.9625 
            |  
         
           30.66% 
            |  
      
|  
           2002 
            |  
         
           21.15 
            |  
         
           16.90 
              
           |  
         
           -4.25 
            |  
         
           -20.09% 
            |  
      
|  
           2003 
            |  
         
           16.90 
            |  
         
           22.89 
              
           |  
         
           5.99 
            |  
         
           35.44% 
            |  
      
|  
           2004 
            |  
         
           22.89 
            |  
         
           30.75 
              
           |  
         
           7.86 
            |  
         
           34.34% 
            |  
      
|  
           2005 
            |  
         
           30.75 
            |  
         
           41.96 
              
           |  
         
           11.21 
            |  
         
           36.46% 
            |  
      
|  
           2006 
            |  
         
           41.96 
            |  
         
           47.28 
              
           |  
         
           5.32 
                
           |  
         
           12.68% 
            |  
      
|  
           2007 
            |  
         
           47.28 
            |  
         
           49.04 
            |  
         
           1.76 
            |  
         
             3.72% 
            |  
      
|  
           2008 
            |  
         
           49.04 
            |  
         
           24.02 
            |  
         
           -25.02 
            |  
         
           -51.02% 
            |  
      
|  
           2009 
            |  
         
           24.02 
            |  
         
           35.79 
            |  
         
           11.77 
            |  
         
           49.00% 
            |  
      
|  
           2010 
            |  
         
           35.79 
            |  
         
           48.30 
            |  
         
           12.51 
            |  
         
           34.95% 
            |  
      
|  
           2011 
            |  
         
           48.30 
            |  
         
           54.60 
            |  
         
           6.30 
            |  
         
           13.04% 
            |  
      
|  
           2012 
            |  
         
           54.60 
            |  
         
           72.00** 
            |  
         
           17.40 
            |  
         
           31.87% 
            |