 
 
|      Year  
           |   Beginning Price  
           |   Ending Price  
           |   Gain or Loss 
           |   Percent Gain or Loss  
           | 
| 1981 
           | 8.25 
           | 11.875 
                 | 3.625 
           | 43.94% 
           | 
| 1982 
           | 11.875 
           | 21.50 
               | 9.625 
           | 81.05% 
           | 
| 1983 
           | 21.50 
           | 22.75 
             | 1.25 
           | 5.81% 
           | 
| 1984 
           | 22.75 
           | 18.00 
             | -4.75 
           | -20.88% 
           | 
| 1985 
           | 18.00 
           | 23.10* 
             | 5.10 
           | 28.33% 
           | 
| 1986 
           | 21.00 
           | 22.8125* 
             | 1.8125 
           | 8.63% 
           | 
| 1987 
           | 18.25 
           | 19.6875* 
             | 1.4375 
           | 7.88% 
           | 
| 1988 
           | 15.75 
           | 15.00 
           | -0.75 
           | -4.76% 
           | 
| 1989 
           | 15.00 
           | 15.40* 
             | 0.40 
           | 2.67% 
           | 
| 1990 
           | 14.00 
           | 14.125 
             | 0.125 
           | 0.89% 
           | 
| 1991 
           | 14.125 
           | 26.00 
             | 11.875 
           | 84.07% 
           | 
| 1992 
           | 26.00 
           | 26.00* 
             | 0 
           | 0.00% 
           | 
| 1993 
           | 19.50 
           | 21.875 
             | 2.375 
           | 12.18% 
           | 
| 1994 
           | 21.875 
           | 20.50 
             | -1.375 
           | -6.29% 
           | 
| 1995 
           | 20.50 
           | 19.00 
             | -1.50 
           | -7.32% 
           | 
| 1996 
           | 19.00 
           | 13.50 
             | -5.50 
           | -28.95% 
           | 
| 1997 
           | 13.50 
           | 22.125 
           | 8.625 
           | 63.89% 
           | 
| 1998 
           | 22.125 
           | 26.0625 
             | 3.9375 
           | 17.80% 
           | 
| 1999 
           | 26.0625 
           | 15.4375 
               | -10.625 
           | -40.77% 
           | 
| 2000 
           | 15.4375 
           | 21.3125 
             | 5.875 
           | 38.06% 
           | 
| 2001 
           | 21.3125 
           | 24.57 
             | 3.2575 
           | 15.28% 
           | 
| 2002 
           | 24.57 
           | 23.35 
             | -1.22 
           | -4.97% 
           | 
| 2003 
           | 23.35 
           | 32.46 
             | 9.11 
           | 39.01% 
           | 
| 2004 
           | 32.46 
           | 26.14 
             | -6.32 
           | -19.47% 
           | 
| 2005 
           | 26.14 
           | 23.06 
             | -3.08 
           | -11.78% 
           | 
| 2006 
           | 23.06 
           | 34.22 
             | 11.16 
           | 48.40% 
           | 
| 2007 
           | 34.22 
           | 26.93 
           | -7.29 
           | -21.30% 
           | 
| 2008 
           | 26.93 
           | 20.43 
           | -6.50 
             | -24.14% 
             | 
| 2009 
           | 20.43 
           | 28.96 
           | 8.53 
           | 41.75% 
           | 
| 2010 
           | 28.96 
           | 32.96 
           | 4.00 
           | 13.81% 
           | 
| 2011 
           | 32.96 
           | 33.54 
           | 0.58 
           | 1.76% 
           | 
| 2012 
           | 33.54 
           | 40.20 
           | 6.66 
           | 19.86% 
           | 
| 2013 
           | 40.20 
           | 50.59 
           | 10.39 
           | 25.85% 
           | 
| 2014 
           | 50.59 
           | 51.18 
           | 0.59 
           | 1.17% 
           | 
| 2015 
           | 51.18 
           | 38.85 
           | -12.33 
           | -24.09% 
           | 
| 2016 
           | 38.85 
           | 53.21 
           | 14.36 
           | 36.96% 
           | 
| 2017 
           | 53.21 
           | 77.00* 
           | 23.79 
           | 44.71% 
           |