Year | Value | 2021 | 72.651 | 2020 | 75.545 | 2019 | 75.812 | 2018 | 75.571 | 2017 | 75.52 | 2016 | 75.392 | 2015 | 75.178 | 2014 | 75.1 | 2013 | 74.927 | 2012 | 74.731 | 2011 | 74.525 | 2010 | 74.29 | 2009 | 74.127 | 2008 | 73.899 | 2007 | 73.682 | 2006 | 73.423 | 2005 | 72.701 | 2004 | 72.809 | 2003 | 72.447 | 2002 | 72.042 | 2001 | 71.602 | 2000 | 71.105 | 1999 | 70.529 | 1998 | 69.736 | 1997 | 69.172 | 1996 | 68.468 | 1995 | 67.785 | 1994 | 67.24 | 1993 | 66.74 | 1992 | 66.373 | 1991 | 66.052 | 1990 | 65.582 | 1989 | 65.3 | 1988 | 64.814 | 1987 | 64.234 | 1986 | 63.67 | 1985 | 63.085 | 1984 | 62.508 | 1983 | 61.928 | 1982 | 56.905 | 1981 | 60.666 | 1980 | 59.997 | 1979 | 59.577 | 1978 | 59.031 | 1977 | 58.354 | 1976 | 50.371 | 1975 | 56.726 | 1974 | 55.732 | 1973 | 54.601 | 1972 | 53.408 | 1971 | 52.275 | 1970 | 51.261 | 1969 | 50.354 | 1968 | 49.884 | 1967 | 49.362 | 1966 | 49.023 | 1965 | 48.872 | 1964 | 48.53 | 1963 | 48.102 | 1962 | 47.575 | 1961 | 46.963 | 1960 | 46.249 |
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