Year | Value | 2022 | 83.929 | 2021 | 83.041 | 2020 | 83.697 | 2019 | 83.433 | 2018 | 83.149 | 2017 | 82.864 | 2016 | 82.588 | 2015 | 82.03 | 2014 | 81.708 | 2013 | 81.365 | 2012 | 81.03 | 2011 | 80.668 | 2010 | 80.358 | 2009 | 80.052 | 2008 | 79.729 | 2007 | 79.407 | 2006 | 79.108 | 2005 | 77.758 | 2004 | 76.996 | 2003 | 77.113 | 2002 | 76.916 | 2001 | 76.634 | 2000 | 76.432 | 1999 | 76.739 | 1998 | 77.222 | 1997 | 77.069 | 1996 | 76.49 | 1995 | 75.741 | 1994 | 75.583 | 1993 | 75.275 | 1992 | 74.888 | 1991 | 74.6 | 1990 | 74.204 | 1989 | 73.724 | 1988 | 73.177 | 1987 | 72.855 | 1986 | 71.947 | 1985 | 71.182 | 1984 | 70.38 | 1983 | 69.436 | 1982 | 68.972 | 1981 | 68.642 | 1980 | 68.042 | 1979 | 67.016 | 1978 | 66.324 | 1977 | 65.778 | 1976 | 65.329 | 1975 | 64.559 | 1974 | 63.716 |
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