Year | Value | 2023 | 80.452 | 2022 | 79.471 | 2021 | 76.349 | 2020 | 78.23 | 2019 | 79.695 | 2018 | 79.517 | 2017 | 79.334 | 2016 | 79.154 | 2015 | 78.988 | 2014 | 78.924 | 2013 | 78.893 | 2012 | 78.781 | 2011 | 78.405 | 2010 | 78.189 | 2009 | 77.866 | 2008 | 77.663 | 2007 | 77.284 | 2006 | 77.093 | 2005 | 76.837 | 2004 | 76.589 | 2003 | 76.293 | 2002 | 75.789 | 2001 | 75.526 | 2000 | 75.289 | 1999 | 75.175 | 1998 | 75.171 | 1997 | 74.87 | 1996 | 74.456 | 1995 | 74.079 | 1994 | 73.845 | 1993 | 73.67 | 1992 | 73.499 | 1991 | 73.365 | 1990 | 73.109 | 1989 | 72.782 | 1988 | 72.323 | 1987 | 71.999 | 1986 | 71.905 | 1985 | 68.519 | 1984 | 71.508 | 1983 | 71.211 | 1982 | 70.87 | 1981 | 70.185 | 1980 | 69.601 | 1979 | 68.984 | 1978 | 68.508 | 1977 | 67.79 | 1976 | 67.11 | 1975 | 66.388 |
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