Year | Value | 2021 | 69.237 | 2020 | 71.797 | 2019 | 73.129 | 2018 | 72.726 | 2017 | 72.551 | 2016 | 72.355 | 2015 | 72.103 | 2014 | 71.964 | 2013 | 71.728 | 2012 | 71.463 | 2011 | 71.177 | 2010 | 70.878 | 2009 | 70.641 | 2008 | 70.356 | 2007 | 70.1 | 2006 | 69.812 | 2005 | 69.168 | 2004 | 69.165 | 2003 | 68.797 | 2002 | 68.386 | 2001 | 67.946 | 2000 | 67.446 | 1999 | 66.869 | 1998 | 66.114 | 1997 | 65.536 | 1996 | 64.863 | 1995 | 64.195 | 1994 | 63.726 | 1993 | 63.349 | 1992 | 62.913 | 1991 | 62.725 | 1990 | 62.473 | 1989 | 62.374 | 1988 | 62.029 | 1987 | 61.432 | 1986 | 60.772 | 1985 | 60.203 | 1984 | 59.558 | 1983 | 58.718 | 1982 | 50.134 | 1981 | 55.972 | 1980 | 56.024 | 1979 | 56.185 | 1978 | 55.963 | 1977 | 55.816 | 1976 | 49.169 | 1975 | 54.824 | 1974 | 54.039 | 1973 | 53.003 | 1972 | 51.638 | 1971 | 50.484 | 1970 | 49.439 | 1969 | 48.548 | 1968 | 48.298 | 1967 | 47.984 | 1966 | 47.764 | 1965 | 47.814 | 1964 | 47.712 | 1963 | 47.407 | 1962 | 46.995 | 1961 | 46.47 | 1960 | 45.808 |
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