1979-80 - 18.37 inches
1980-81 - 11.62 inches
1981-82 - 11.84 inches
1982-83 - 29.71 inches
1983-84 - 12.05 inches
1984-85 - 15.07 inches
1985-86 - 19.92 inches
1986-87 - 10.31 inches
1987-88 - 25.36 inches
1988-89 - 6.83 inches
1989-90 - 12.17 inches
1990-91 - 9.87 inches
1991-92 - 15.09 inches
1992-93 - 19.66 inches
1993-94 - 27.68 inches
1994-95 - 32.81 inches
1995-96 - 13.64 inches
1996-97 - 14.22 inches
1997-98 - 28.35 inches
1998-99 - 17.48 inches
1999-2000- 14.43 inch
2000-01 - 11.50 inches
2001-02 - 11.75 inches
2002-03 - 10.01 inches
2003-04 - 9.77 inches
2004-05 - 31.29 inches
2005-06 - 22.26 inches
2006-07 - 8.45 inches
2007-08 - inches