Year | Value | 2021 | 65.827 | 2020 | 66.593 | 2019 | 66.306 | 2018 | 66.195 | 2017 | 65.986 | 2016 | 65.341 | 2015 | 65.163 | 2014 | 64.55 | 2013 | 64.393 | 2012 | 63.801 | 2011 | 63.608 | 2010 | 63.06 | 2009 | 62.869 | 2008 | 62.269 | 2007 | 61.999 | 2006 | 61.645 | 2005 | 61.431 | 2004 | 61.269 | 2003 | 60.863 | 2002 | 60.656 | 2001 | 60.783 | 2000 | 60.373 | 1999 | 60.495 | 1998 | 60.117 | 1997 | 60.231 | 1996 | 59.751 | 1995 | 59.397 | 1994 | 58.922 | 1993 | 58.521 | 1992 | 57.815 | 1991 | 57.177 | 1990 | 56.873 | 1989 | 56.489 | 1988 | 56.117 | 1987 | 55.628 | 1986 | 55.446 | 1985 | 54.943 | 1984 | 54.479 | 1983 | 53.813 | 1982 | 53.535 | 1981 | 53.059 | 1980 | 52.595 | 1979 | 52.118 | 1978 | 51.627 | 1977 | 50.967 | 1976 | 50.495 | 1975 | 48.543 | 1974 | 49.45 | 1973 | 48.894 | 1972 | 48.303 | 1971 | 47.387 | 1970 | 46.439 | 1969 | 45.453 | 1968 | 44.445 | 1967 | 43.42 | 1966 | 42.56 | 1965 | 41.961 | 1964 | 41.572 | 1963 | 41.328 | 1962 | 40.919 | 1961 | 40.536 | 1960 | 40.018 |
|