Year | Value | 2021 | 66.098 | 2020 | 66.335 | 2019 | 67.651 | 2018 | 67.075 | 2017 | 66.942 | 2016 | 66.483 | 2015 | 66.276 | 2014 | 65.783 | 2013 | 65.682 | 2012 | 65.254 | 2011 | 65.07 | 2010 | 64.748 | 2009 | 64.517 | 2008 | 64.124 | 2007 | 63.942 | 2006 | 63.566 | 2005 | 63.394 | 2004 | 63.284 | 2003 | 63.02 | 2002 | 62.87 | 2001 | 62.751 | 2000 | 62.608 | 1999 | 62.442 | 1998 | 62.345 | 1997 | 62.06 | 1996 | 61.592 | 1995 | 61.739 | 1994 | 61.748 | 1993 | 61.684 | 1992 | 61.623 | 1991 | 61.322 | 1990 | 61.214 | 1989 | 60.941 | 1988 | 60.645 | 1987 | 60.112 | 1986 | 59.572 | 1985 | 59.255 | 1984 | 58.884 | 1983 | 58.469 | 1982 | 58.08 | 1981 | 57.408 | 1980 | 56.767 | 1979 | 56.119 | 1978 | 55.462 | 1977 | 54.979 | 1976 | 54.544 | 1975 | 54.351 | 1974 | 53.804 | 1973 | 53.504 | 1972 | 53.166 | 1971 | 52.79 | 1970 | 52.296 | 1969 | 51.71 | 1968 | 51.009 | 1967 | 50.238 | 1966 | 49.527 | 1965 | 48.813 | 1964 | 48.145 | 1963 | 47.329 | 1962 | 46.611 | 1961 | 45.94 | 1960 | 45.267 |
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