Year | Value | 2021 | 74.396 | 2020 | 75.348 | 2019 | 75.766 | 2018 | 75.877 | 2017 | 75.674 | 2016 | 75.474 | 2015 | 75.369 | 2014 | 75.301 | 2013 | 74.999 | 2012 | 75.069 | 2011 | 73.859 | 2010 | 74.883 | 2009 | 74.842 | 2008 | 74.794 | 2007 | 74.202 | 2006 | 74.093 | 2005 | 73.991 | 2004 | 73.906 | 2003 | 73.529 | 2002 | 73.498 | 2001 | 73.239 | 2000 | 72.944 | 1999 | 73.162 | 1998 | 73.33 | 1997 | 73.219 | 1996 | 73.369 | 1995 | 73.222 | 1994 | 73.06 | 1993 | 72.623 | 1992 | 72.492 | 1991 | 72.306 | 1990 | 71.829 | 1989 | 71.581 | 1988 | 71.089 | 1987 | 70.857 | 1986 | 70.31 | 1985 | 70.02 | 1984 | 69.542 | 1983 | 69.259 | 1982 | 68.726 | 1981 | 68.152 | 1980 | 67.613 | 1979 | 66.843 | 1978 | 66.001 | 1977 | 65.062 | 1976 | 64.149 | 1975 | 62.772 | 1974 | 61.258 | 1973 | 60.002 | 1972 | 59.194 | 1971 | 58.005 | 1970 | 56.862 | 1969 | 55.575 | 1968 | 54.434 | 1967 | 52.974 | 1966 | 51.65 | 1965 | 50.106 | 1964 | 48.495 | 1963 | 46.559 | 1962 | 45.191 | 1961 | 43.269 | 1960 | 41.447 |
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