Year | Value | 2021 | 65.533 | 2020 | 66.745 | 2019 | 68.481 | 2018 | 68.311 | 2017 | 68.001 | 2016 | 67.87 | 2015 | 67.791 | 2014 | 67.624 | 2013 | 67.228 | 2012 | 67.177 | 2011 | 67.079 | 2010 | 66.93 | 2009 | 66.599 | 2008 | 66.519 | 2007 | 66.459 | 2006 | 66.048 | 2005 | 66.009 | 2004 | 64.374 | 2003 | 65.611 | 2002 | 65.574 | 2001 | 65.032 | 2000 | 64.9 | 1999 | 64.492 | 1998 | 64.475 | 1997 | 64.144 | 1996 | 63.858 | 1995 | 63.702 | 1994 | 63.364 | 1993 | 62.933 | 1992 | 62.649 | 1991 | 62.082 | 1990 | 61.604 | 1989 | 61.119 | 1988 | 60.655 | 1987 | 60.536 | 1986 | 60.145 | 1985 | 59.785 | 1984 | 59.18 | 1983 | 58.564 | 1982 | 58.152 | 1981 | 57.491 | 1980 | 56.977 | 1979 | 56.379 | 1978 | 55.712 | 1977 | 55.162 | 1976 | 54.636 | 1975 | 54.161 | 1974 | 53.642 | 1973 | 53.041 | 1972 | 52.444 | 1971 | 51.736 | 1970 | 51.193 | 1969 | 50.59 | 1968 | 49.885 | 1967 | 49.366 | 1966 | 46.321 | 1965 | 39.127 | 1964 | 47.675 | 1963 | 47.075 | 1962 | 46.557 | 1961 | 45.734 | 1960 | 45.022 |
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