1982 -32.5 6.663 1983 -32.5 5.778 1984 -32.5 6.169 1985 -32.5 6.871 1986 -32.5 6.585 1987 -32.5 6.065 1988 -32.5 5.830 1989 -32.5 6.351 1990 -32.5 5.986 1991 -32.5 6.976 1992 -32.5 6.663 1993 -32.5 6.065 1994 -32.5 6.247 1995 -32.5 6.143 1996 -32.5 6.169 1997 -32.5 6.403 1998 -32.5 6.351 1999 -32.5 6.351 2000 -32.5 5.726 2001 -32.5 7.002 2002 -32.5 6.689 2003 -32.5 5.752 2004 -32.5 6.585 2005 -32.5 6.819 2006 -32.5 6.273 2007 -32.5 6.481 2008 -32.5 6.143 2009 -32.5 6.429 2010 -32.5 6.143 2011 -32.5 5.986 2012 -32.5 7.158 2013 -32.5 6.221 2014 -32.5 6.611 2015 -32.5 7.002 2016 -32.5 5.830 2017 -32.5 7.028 2018 -32.5 6.533 2019 -32.5 6.403 2020 -32.5 6.247