Year | Value | 2023 | 77.463 | 2022 | 77.022 | 2021 | 76.569 | 2020 | 76.105 | 2019 | 75.63 | 2018 | 75.143 | 2017 | 74.644 | 2016 | 74.134 | 2015 | 73.611 | 2014 | 73.077 | 2013 | 72.531 | 2012 | 71.974 | 2011 | 71.402 | 2010 | 70.825 | 2009 | 70.241 | 2008 | 69.651 | 2007 | 69.053 | 2006 | 68.45 | 2005 | 67.84 | 2004 | 67.225 | 2003 | 66.602 | 2002 | 65.974 | 2001 | 65.34 | 2000 | 64.741 | 1999 | 64.223 | 1998 | 63.703 | 1997 | 63.179 | 1996 | 62.653 | 1995 | 62.123 | 1994 | 61.59 | 1993 | 61.055 | 1992 | 60.518 | 1991 | 59.976 | 1990 | 59.203 | 1989 | 57.899 | 1988 | 56.587 | 1987 | 55.261 | 1986 | 53.93 | 1985 | 52.448 | 1984 | 50.634 | 1983 | 48.812 | 1982 | 46.997 | 1981 | 45.189 | 1980 | 43.78 | 1979 | 43.355 | 1978 | 42.931 | 1977 | 42.508 | 1976 | 42.087 | 1975 | 41.586 | 1974 | 40.92 |
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