Year | Value | 2021 | 74.418 | 2020 | 76.751 | 2019 | 77.002 | 2018 | 76.996 | 2017 | 77.07 | 2016 | 77.01 | 2015 | 76.698 | 2014 | 76.409 | 2013 | 77.112 | 2012 | 77.009 | 2011 | 77.048 | 2010 | 76.34 | 2009 | 76.216 | 2008 | 75.99 | 2007 | 76.089 | 2006 | 76.079 | 2005 | 76.231 | 2004 | 76.104 | 2003 | 75.82 | 2002 | 75.692 | 2001 | 75.297 | 2000 | 75.252 | 1999 | 74.695 | 1998 | 74.658 | 1997 | 74.646 | 1996 | 74.657 | 1995 | 74.272 | 1994 | 74.563 | 1993 | 74.686 | 1992 | 74.668 | 1991 | 74.767 | 1990 | 74.604 | 1989 | 74.129 | 1988 | 74.186 | 1987 | 73.902 | 1986 | 73.687 | 1985 | 73.203 | 1984 | 73.339 | 1983 | 73.502 | 1982 | 72.829 | 1981 | 72.251 | 1980 | 70.737 | 1979 | 70.391 | 1978 | 70.173 | 1977 | 69.088 | 1976 | 68.194 | 1975 | 67.207 | 1974 | 66.09 | 1973 | 65.773 | 1972 | 64.458 | 1971 | 64.016 | 1970 | 63.154 | 1969 | 62.711 | 1968 | 62.449 | 1967 | 62.044 | 1966 | 61.552 | 1965 | 60.608 | 1964 | 60.244 | 1963 | 60.021 | 1962 | 59.491 | 1961 | 59.296 | 1960 | 58.821 |
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