| 1979 | $55,028 |
| 1980 19.9+ | $66,028 |
| 1981 8.9+ | $71,889 |
| 1982 11.8+ | $80,347 |
| 1983 10.1+ | $88,464 |
| 1984 15.0+ | $101,738 |
| 1985 4.4+ | $106,265 |
| 1986 2.5+ | $108,887 |
| 1987 6.5- | $101,826 |
| 1988 11.0- | $90,587 |
| 1989 5.5- | $85,562 |
| 1990 .9- | $84,744 |
| 1991 5.3+ | $89,263 |
| 1992 18.8+ | $106,265 |
| 1993 8.1+ | $114,918 |
| 1994 4.9 + | $120,500 |
|
| 1995 4 + | $125,300 |
| 1996 6.1 + | $132,900 |
| 1997 6.1 + | $141,000 |
| 1998 5.5 + | $148,700 |
| 1999 9.8 + | $163,200 |
| 2000 16.6 + | $190,300 |
| 2001 1.3 + | $192,800 |
| 2002 2.4 + | $197,500 |
| 2003 0.6 - | $196,250 |
| 2004 0.9 + | $198,000 |
| 2005 5.8 + | $209,500 |
| 2006 9.4 + | $229,250 |
| 2007 7.1 + | $245,500 |
| 2008 1.2 - | $242,500 |
| 2009 (8 mo) 3.0- | $235,250 |
|
