Year | Value | 2021 | 74.332 | 2020 | 76.626 | 2019 | 77.247 | 2018 | 77.021 | 2017 | 76.845 | 2016 | 76.668 | 2015 | 76.486 | 2014 | 76.341 | 2013 | 76.266 | 2012 | 76.13 | 2011 | 75.677 | 2010 | 75.37 | 2009 | 74.861 | 2008 | 74.045 | 2007 | 73.484 | 2006 | 72.775 | 2005 | 71.829 | 2004 | 71.853 | 2003 | 71.612 | 2002 | 71.528 | 2001 | 70.95 | 2000 | 71.06 | 1999 | 71.209 | 1998 | 70.884 | 1997 | 71.444 | 1996 | 72.172 | 1995 | 71.981 | 1994 | 72.483 | 1993 | 71.632 | 1992 | 71.462 | 1991 | 71.906 | 1990 | 72.487 | 1989 | 72.836 | 1988 | 72.575 | 1987 | 72.097 | 1986 | 71.573 | 1985 | 70.741 | 1984 | 70.606 | 1983 | 69.652 | 1982 | 69.203 | 1981 | 69.538 | 1980 | 69.353 | 1979 | 69.224 | 1978 | 68.808 | 1977 | 68.594 | 1976 | 68.136 | 1975 | 67.377 | 1974 | 66.65 | 1973 | 66.509 | 1972 | 65.807 | 1971 | 65.552 | 1970 | 65.297 | 1969 | 64.526 | 1968 | 63.942 | 1967 | 63.464 | 1966 | 62.773 | 1965 | 62.327 | 1964 | 61.927 | 1963 | 61.624 | 1962 | 61.105 | 1961 | 54.21 | 1960 | 60.42 |
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