Year | Value | 2023 | 69.569 | 2022 | 69.025 | 2021 | 67.324 | 2020 | 68.611 | 2019 | 69.224 | 2018 | 69.023 | 2017 | 68.536 | 2016 | 68.266 | 2015 | 68.482 | 2014 | 68.462 | 2013 | 68.266 | 2012 | 67.864 | 2011 | 67.887 | 2010 | 66.9 | 2009 | 66.454 | 2008 | 65.802 | 2007 | 66.203 | 2006 | 66.11 | 2005 | 66.384 | 2004 | 66.901 | 2003 | 67.706 | 2002 | 66.542 | 2001 | 66.457 | 2000 | 65.902 | 1999 | 65.795 | 1998 | 65.595 | 1997 | 65.549 | 1996 | 65.994 | 1995 | 64.576 | 1994 | 63.939 | 1993 | 62.04 | 1992 | 63.017 | 1991 | 63.578 | 1990 | 64.243 | 1989 | 64.166 | 1988 | 64.515 | 1987 | 64.876 | 1986 | 64.929 | 1985 | 64.615 | 1984 | 64.384 | 1983 | 64.601 | 1982 | 64.606 | 1981 | 64.223 | 1980 | 63.821 | 1979 | 63.444 | 1978 | 63.089 | 1977 | 62.779 | 1976 | 62.421 | 1975 | 61.998 |
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