Year | Value | 2022 | 81.304 | 2021 | 81.056 | 2020 | 80.81 | 2019 | 80.565 | 2018 | 80.321 | 2017 | 80.08 | 2016 | 79.84 | 2015 | 79.602 | 2014 | 79.366 | 2013 | 79.133 | 2012 | 78.902 | 2011 | 78.673 | 2010 | 78.442 | 2009 | 78.21 | 2008 | 77.976 | 2007 | 77.74 | 2006 | 77.502 | 2005 | 77.263 | 2004 | 77.022 | 2003 | 76.778 | 2002 | 76.533 | 2001 | 76.343 | 2000 | 76.262 | 1999 | 76.181 | 1998 | 76.1 | 1997 | 76.019 | 1996 | 75.938 | 1995 | 75.856 | 1994 | 75.774 | 1993 | 75.692 | 1992 | 75.61 | 1991 | 75.528 | 1990 | 75.351 | 1989 | 75.126 | 1988 | 74.9 | 1987 | 74.673 | 1986 | 74.444 | 1985 | 74.213 | 1984 | 73.982 | 1983 | 73.749 | 1982 | 73.515 | 1981 | 73.279 | 1980 | 72.789 | 1979 | 72.162 | 1978 | 71.527 | 1977 | 70.883 | 1976 | 70.231 | 1975 | 69.57 | 1974 | 68.901 | 1973 | 68.224 | 1972 | 67.541 | 1971 | 66.848 | 1970 | 66.038 | 1969 | 65.108 | 1968 | 64.168 | 1967 | 63.214 | 1966 | 62.251 | 1965 | 61.278 | 1964 | 60.298 | 1963 | 59.306 | 1962 | 58.308 | 1961 | 57.303 | 1960 | 56.567 |
|