 
 
|      Year  
           |   Beginning Price  
           |   Ending Price  
           |   Gain or Loss 
           |   Percent Gain or Loss  
           | 
| 1975 
           | 9.50 
           | 17.75 
           | 8.25 
           | 86.84% 
           | 
| 1976 
           | 17.75 
           | 20.25 
           | 2.50 
           | 14.08% 
           | 
| 1977 
           | 20.25 
           | 19.375 
           | -0.875 
           | -4.32% 
           | 
| 1978 
           | 19.375 
           | 17.50 
           | -1.875 
           | -9.68% 
           | 
| 1979 
           | 17.50 
           | 17.75 
           | 0.25 
           | 1.43% 
           | 
| 1980 
           | 17.75 
               | 17.375 
           | -0.375 
           | -2.11% 
           | 
| 1981 
           | 17.375 
               | 20.00 
           | 2.625 
           | 15.11% 
           | 
| 1982 
           | 20.00 
           | 20.75 
           | 0.75 
           | 3.75% 
           | 
| 1983 
           | 20.75 
           | 26.875 
           | 6.125 
           | 29.52% 
           | 
| 1984 
           | 26.875 
           | 29.75 
           | 2.875 
           | 10.70% 
           | 
| 1985 
           | 29.75 
           | 34.625 
           | 4.875 
           | 16.39% 
           | 
| 1986 
           | 34.625 
           | 46.00 
           | 11.375 
           | 32.85% 
           | 
| 1987 
           | 46.00 
           | 44.50* 
           | -1.50 
           | -3.26% 
           | 
| 1988 
           | 22.25 
           | 23.75 
           | 1.50 
           | 6.74% 
           | 
| 1989 
           | 23.75 
           | 29.50 
           | 5.75 
           | 24.21% 
           | 
| 1990 
           | 29.50 
           | 33.75 
           | 4.25 
           | 14.41% 
           | 
| 1991 
           | 33.75 
           | 41.75 
           | 8.00 
           | 23.70% 
           | 
| 1992 
           | 41.75 
           | 41.625 
           | -0.125 
           | -0.30% 
           | 
| 1993 
           | 41.625 
           | 45.25* 
           | 3.625 
           | 8.71% 
           | 
| 1994 
           | 22.625 
           | 20.25 
           | -2.375 
           | -10.50% 
           | 
| 1995 
           | 20.25 
           | 25.625 
           | 5.375 
           | 26.54% 
           | 
| 1996 
           | 25.625 
           | 24.125 
           | -1.50 
           | -5.85% 
           | 
| 1997 
           | 24.125 
           | 28.125 
           | 4.00 
           | 16.58% 
           | 
| 1998 
           | 28.125 
           | 28.1875 
           | 0.0625 
           | 0.22% 
           | 
| 1999 
           | 28.1875 
           | 18.5625 
           | -9.625 
           | -34.15% 
           | 
| 2000 
           | 18.5625 
           | 32.375 
           | 13.8125 
           | 74.41% 
           | 
| 2001 
           | 32.375 
           | 26.24 
           | -6.135 
           | -18.95% 
           | 
| 2002 
           | 26.24 
           | 15.47 
           | -10.77 
           | -41.04% 
           | 
| 2003 
           | 15.47 
           | 14.41 
           | -1.06 
           | -6.85% 
           | 
| 2004 
           | 14.41 
           | 15.35 
           | 0.94 
           | 6.52% 
           | 
| 2005 
           | 15.35 
           | 17.18 
           | 1.83 
           | 11.92% 
           | 
| 2006 
           | 17.18 
           | 17.23 
           | 0.05 
           | 0.29% 
           | 
| 2007 
           | 17.23 
           | 17.21 
           | -0.02 
           | -0.12% 
           | 
| 2008 
           | 17.21 
           | 12.35 
           | -4.86 
           | -28.24% 
           | 
| 2009 
           | 12.35 
           | 16.22 
           | 3.87 
           | 31.34% 
           | 
| 2010 
           | 16.22 
           | 17.80 
           | 1.58 
           | 9.74% 
           | 
| 2011 
           | 17.80 
           | 19.14 
           | 1.34 
           | 7.53% 
           | 
| 2012 
           | 19.14 
           | 16.76 
           | -2.38 
           | -12.43% 
           | 
| 2013 
           | 16.76 
           | 17.24 
           | 0.48 
           | 2.86% 
           | 
| 2014 
           | 17.24 
           | 20.49 
           | 3.25 
           | 18.85% 
           | 
| 2015 
           | 20.49 
           | 26.65 
           | 6.16 
           | 30.06% 
           | 
| 2016 
           | 26.65 
           | 27.55 
           | 0.90 
           | 3.38% 
           |