 
 
|      Year  
           |   Beginning Price  
           |   Ending Price  
           |   Gain or Loss 
           |   Percent Gain or Loss  
           | 
| 1988 
           | 20.75 
           | 42.125 
             | 21.375 
           | 103.01% 
           | 
| 1989 
           | 42.125 
           | 70.125* 
             | 28.00 
           | 66.47% 
           | 
| 1990 
           | 46.75 
           | 35.375 
             | -11.375 
           | -24.33% 
           | 
| 1991 
           | 35.375 
           | 45.25 
             | 9.875 
           | 27.92% 
           | 
| 1992 
           | 45.25 
           | 34.625 
             | -10.625 
           | -23.48% 
           | 
| 1993 
           | 34.625 
           | 31.875 
             | -2.75 
           | -7.94% 
           | 
| 1994 
           | 31.875 
           | 39.00 
             | 7.125 
           | 22.35% 
           | 
| 1995 
           | 39.00 
           | 50.375 
           | 11.375 
           | 29.17% 
           | 
| 1996 
           | 50.375 
           | 73.25* 
           | 22.875 
           | 45.41% 
           | 
| 1997 
           | 36.625 
           | 36.0625 
           | -0.5625 
           | -1.54% 
           | 
| 1998 
           | 36.0625 
           | 51.875 
           | 15.8125 
           | 43.85% 
           | 
| 1999 
           | 51.875 
           | 178.50* 
             | 126.625 
           | 244.10% 
           | 
| 2000 
           | 89.25 
           | 63.25* 
           | -26.00 
           | -29.13% 
           | 
| 2001 
           | 31.625 
           | 31.47 
             | -0.155 
           | -0.49% 
           | 
| 2002 
           | 31.47 
           | 23.91 
             | -7.56 
           | -24.02% 
           | 
| 2003 
           | 23.91 
           | 45.20 
           | 21.29 
           | 89.04% 
           | 
| 2004 
           | 45.20 
           | 31.97 
             | -13.23 
           | -29.27% 
           | 
| 2005 
           | 31.97 
           | 38.29 
           | 6.32 
           | 19.77% 
           | 
| 2006 
           | 38.29 
           | 39.24 
             | 0.95 
           | 2.48% 
           | 
| 2007 
           | 39.24 
           | 46.03 
           | 6.79 
           | 17.30% 
           | 
| 2008 
           | 46.03 
           | 23.63 
           | -22.40 
           | -48.66% 
           | 
| 2009 
           | 23.63 
           | 43.00 
           | 19.37 
           | 81.97% 
           | 
| 2010 
           | 43.00 
           | 62.27 
           | 19.27 
           | 44.81% 
           | 
| 2011 
           | 62.27 
           | 66.26 
           | 3.99 
           | 6.41% 
           | 
| 2012 
           | 66.26 
           | 57.34 
           | -8.92 
           | -13.46% 
           | 
| 2013 
           | 57.34 
           | 92.78 
           | 35.44 
           | 61.81% 
           | 
| 2014 
           | 92.78 
           | 106.86 
           | 14.08 
           | 15.18% 
           | 
| 2015 
           | 106.86 
           | 76.29 
           | -30.57 
           | -28.61% 
           | 
| 2016 
           | 76.29 
           | 77.43 
           | 1.14 
           | 1.49% 
           | 
| 2017 
           | 77.43 
           | 103.95 
           | 26.52 
           | 34.25% 
           | 
| 2018 
           | 103.95 
           | 80.51 
           | -23.44 
           | -22.55% 
           | 
| 2019 
           | 80.51 
           | 133.65 
           | 53.14 
           | 66.00% 
           | 
| 2020 
           | 133.65 
           | 131.45 
           | -2.20 
           | -1.65% 
           | 
| 2021 
           | 131.45 
           | 131.50* 
           | 0.05 
           | 0.04% 
           |