 
 
|      Year  
           |   Beginning Price  
           |   Ending Price  
           |   Gain or Loss 
           |   Percent Gain or Loss  
           | 
| 1987 
           | 10.00 
           | 15.75* 
             | 5.75 
           | 57.50% 
           | 
| 1988 
           | 10.50 
           | 13.00 
             | 2.50 
           | 23.81% 
           | 
| 1989 
           | 13.00 
           | 7.75 
             | -5.25 
           | -40.38% 
           | 
| 1990 
           | 7.75 
           | 8.25 
             | 0.50 
           | 6.45% 
           | 
| 1991 
           | 8.25 
           | 28.00 
             | 19.75 
           | 239.39% 
           | 
| 1992 
           | 28.00 
           | 60.50* 
             | 32.50 
           | 116.07% 
           | 
| 1993 
           | 30.25 
           | 36.00 
             | 5.75 
           | 19.01% 
           | 
| 1994 
           | 36.00 
           | 34.00* 
           | -2.00 
           | -5.56% 
           | 
| 1995 
           | 17.00 
           | 15.00 
             | -2.00 
           | -11.76% 
           | 
| 1996 
           | 15.00 
           | 27.375 
             | 12.375 
           | 82.50% 
           | 
| 1997 
           | 27.375 
           | 38.875 
             | 11.50 
           | 42.01% 
           | 
| 1998 
           | 38.875 
           | 40.25 
             | 1.375 
           | 3.54% 
           | 
| 1999 
           | 40.25 
           | 27.125 
             | -13.125 
           | -32.61% 
           | 
| 2000 
           | 27.125 
           | 27.05 
             | -0.075 
           | -0.28% 
           | 
| 2001 
           | 27.05 
           | 43.28 
             | 16.23 
           | 60.00% 
           | 
| 2002 
           | 43.28 
           | 26.96 
             | -16.32 
           | -37.71% 
           | 
| 2003 
           | 26.96 
           | 39.69 
             | 12.73 
           | 47.22% 
           | 
| 2004 
           | 39.69 
           | 45.40 
             | 5.71 
           | 14.39% 
           | 
| 2005 
           | 45.40 
           | 39.61 
             | -5.79 
           | -12.75% 
           | 
| 2006 
           | 39.61 
           | 37.87 
             | -1.74 
           | -4.39% 
           | 
| 2007 
           | 37.87 
           | 37.72 
           | -0.15 
           | -0.40% 
             | 
| 2008 
           | 37.72 
           | 17.84 
           | -19.88 
           | -52.70% 
           | 
| 2009 
           | 17.84 
           | 46.66 
           | 28.82 
           | 161.55% 
           | 
| 2010 
           | 46.66 
           | 44.02 
           | -2.64 
           | -5.66% 
           | 
| 2011 
           | 44.02 
           | 49.41 
           | 5.39 
           | 12.24% 
           | 
| 2012 
           | 49.41 
           | 45.53 
           | -3.88 
           | -7.85% 
           | 
| 2013 
           | 45.53 
           | 51.60 
           | 6.07 
           | 13.33% 
           | 
| 2014 
           | 51.60 
           | 63.23 
           | 11.63 
           | 22.54% 
           | 
| 2015 
           | 63.23 
           | 66.38 
           | 3.15 
           | 4.98% 
           | 
| 2016 
           | 66.38 
           | 84.68 
           | 18.30 
           | 27.57% 
           | 
| 2017 
           | 84.68 
           | 97.97 
           | 13.29 
           | 15.69% 
           | 
| 2018 
           | 97.97 
           | 81.81 
           | -16.16 
           | -16.49% 
           | 
| 2019 
           | 81.81 
           | 143.60 
           | 61.79 
           | 75.53% 
           | 
| 2020 
           | 143.60 
           | 145.00* 
           | 1.40 
           | 0.97% 
           |