Year | Value | 2022 | 76.249 | 2021 | 73.287 | 2020 | 70.998 | 2019 | 75.832 | 2018 | 75.708 | 2017 | 75.467 | 2016 | 75.587 | 2015 | 74.788 | 2014 | 74.384 | 2013 | 74.277 | 2012 | 73.833 | 2011 | 73.344 | 2010 | 72.821 | 2009 | 72.777 | 2008 | 71.989 | 2007 | 72.025 | 2006 | 71.557 | 2005 | 70.947 | 2004 | 70.771 | 2003 | 70.336 | 2002 | 69.884 | 2001 | 69.356 | 2000 | 68.794 | 1999 | 68.172 | 1998 | 67.599 | 1997 | 67.08 | 1996 | 66.564 | 1995 | 66.511 | 1994 | 66.071 | 1993 | 65.921 | 1992 | 65.966 | 1991 | 66.004 | 1990 | 66.053 | 1989 | 66.013 | 1988 | 66.282 | 1987 | 66.082 | 1986 | 65.507 | 1985 | 65.377 | 1984 | 65.343 | 1983 | 65.579 | 1982 | 65.15 | 1981 | 65.033 | 1980 | 64.882 | 1979 | 64.784 | 1978 | 64.688 | 1977 | 64.578 | 1976 | 64.613 | 1975 | 64.289 | 1974 | 64.356 |
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