 
 
|      Year  
           |   Beginning Price  
           |   Ending Price  
           |   Gain or Loss 
           |   Percent Gain or Loss  
           | 
| 1975 
           | 36.75 
           | 45.00 
           | 8.25 
           | 22.45% 
           | 
| 1976 
           | 45.00 
           | 66.50* 
           | 21.50 
           | 47.78% 
           | 
| 1977 
           | 33.25 
           | 26.25 
           | -7.00 
           | -21.05% 
           | 
| 1978 
           | 26.25 
           | 25.375 
           | -0.875 
           | -3.33% 
           | 
| 1979 
           | 25.375 
           | 26.00 
           | 0.625 
           | 2.46% 
           | 
| 1980 
           | 26.00 
           | 23.00 
           | -3.00 
               | -11.54% 
           | 
| 1981 
           | 23.00 
           | 23.75 
           | 0.75 
           | 3.26% 
           | 
| 1982 
           | 23.75 
           | 36.00 
           | 12.25 
           | 51.58% 
           | 
| 1983 
           | 36.00 
           | 31.125 
           | -4.875 
           | -13.54% 
           | 
| 1984 
           | 31.125 
           | 29.00 
           | -2.125 
           | -6.83% 
           | 
| 1985 
           | 29.00 
           | 30.25 
           | 1.25 
           | 4.31% 
           | 
| 1986 
           | 30.25 
           | 35.25 
           | 5.00 
           | 16.53% 
           | 
| 1987 
           | 35.25 
           | 27.00 
           | -8.25 
           | -23.40% 
           | 
| 1988 
           | 27.00 
           | 28.75 
           | 1.75 
           | 6.48% 
           | 
| 1989 
           | 28.75 
           | 26.625 
           | -2.125 
           | -7.39% 
           | 
| 1990 
           | 26.625 
           | 26.25 
           | -0.375 
           | -1.41% 
           | 
| 1991 
           | 26.25 
           | 44.125 
           | 17.875 
           | 68.10% 
           | 
| 1992 
           | 44.125 
           | 46.50 
           | 2.375 
           | 5.38% 
           | 
| 1993 
           | 46.50 
           | 82.50 
           | 36.00 
           | 77.42% 
           | 
| 1994 
           | 82.50 
           | 65.50* 
           | -17.00 
           | -20.61% 
           | 
| 1995 
           | 32.75 
           | 43.375 
           | 10.625 
           | 32.44% 
           | 
| 1996 
           | 43.375 
           | 44.00 
           | 0.625 
           | 1.44% 
           | 
| 1997 
           | 44.00 
           | 48.5625 
           | 4.5625 
           | 10.37% 
           | 
| 1998 
           | 48.5625 
           | 49.875 
           | 1.3125 
           | 2.70% 
           | 
| 1999 
           | 49.875 
           | 53.625 
           | 3.75 
           | 7.52% 
           | 
| 2000 
           | 53.625 
           | 44.375 
           | -9.25 
           | -17.25% 
           | 
| 2001 
           | 44.375 
           | 42.70 
           | -1.675 
           | -3.77% 
           | 
| 2002 
           | 42.70 
           | 42.47 
           | -0.23 
           | -0.54% 
           | 
| 2003 
           | 42.47 
           | 67.40 
           | 24.93 
           | 58.70% 
           | 
| 2004 
           | 67.40 
           | 83.16* 
           | 15.76 
           | 23.38% 
           | 
| 2005 
           | 41.58 
           | 38.79 
           | -2.79 
           | -6.71% 
           | 
| 2006 
           | 38.79 
           | 26.95 
           | -11.84 
           | -30.52% 
           | 
| 2007 
           | 26.95 
           | 22.66 
           | -4.29 
           | -15.92% 
           | 
| 2008 
           | 22.66 
           | 17.59 
           | -5.07 
           | -22.37% 
           | 
| 2009 
           | 17.59 
           | 18.71 
           | 1.12 
           | 6.37% 
           | 
| 2010 
           | 18.71 
           | 19.69 
           | 0.98 
           | 5.24% 
           | 
| 2011 
           | 19.69 
           | 15.49 
           | -4.20 
           | -21.33% 
           | 
| 2012 
           | 15.49 
           | 21.08 
           | 5.59 
           | 36.09% 
           | 
| 2013 
           | 21.08 
           | 21.76 
           | 0.68 
           | 3.23% 
           | 
| 2014 
           | 21.76 
           | 20.42 
           | -1.34 
           | -6.16% 
           | 
| 2015 
           | 20.42 
           | 17.30 
           | -3.12 
           | -15.28% 
           | 
| 2016 
           | 17.30 
           | 22.26 
           | 4.96 
           | 28.67% 
           | 
| 2017 
           | 22.26 
           | 25.37 
           | 3.11 
           | 13.97% 
           | 
| 2018 
           | 25.37 
           | 13.08 
           | -12.29 
           | -48.44% 
           | 
| 2019 
           | 13.08 
           | 6.66 
           | -6.42 
           | -49.08% 
           | 
| 2020 
           | 6.66 
           | 0* 
           | -6.66 
           | -100.00% 
           |