Year | Value | 2021 | 78.211 | 2020 | 78.077 | 2019 | 77.968 | 2018 | 77.744 | 2017 | 77.248 | 2016 | 77.218 | 2015 | 76.977 | 2014 | 76.717 | 2013 | 76.452 | 2012 | 76.192 | 2011 | 75.903 | 2010 | 75.599 | 2009 | 75.343 | 2008 | 74.872 | 2007 | 74.762 | 2006 | 74.504 | 2005 | 74.111 | 2004 | 73.748 | 2003 | 73.371 | 2002 | 72.985 | 2001 | 72.606 | 2000 | 71.881 | 1999 | 71.419 | 1998 | 71.172 | 1997 | 70.672 | 1996 | 70.266 | 1995 | 70.008 | 1994 | 69.52 | 1993 | 69.216 | 1992 | 68.734 | 1991 | 68.169 | 1990 | 68.005 | 1989 | 67.838 | 1988 | 67.581 | 1987 | 67.288 | 1986 | 66.97 | 1985 | 66.643 | 1984 | 66.3 | 1983 | 65.904 | 1982 | 65.463 | 1981 | 64.975 | 1980 | 64.42 | 1979 | 63.865 | 1978 | 63.218 | 1977 | 62.538 | 1976 | 61.796 | 1975 | 60.917 | 1974 | 60.168 | 1973 | 59.389 | 1972 | 58.418 | 1971 | 57.565 | 1970 | 56.607 | 1969 | 55.738 | 1968 | 55.057 | 1967 | 54.351 | 1966 | 53.637 | 1965 | 52.912 | 1964 | 52.156 | 1963 | 51.408 | 1962 | 50.818 | 1961 | 40.468 | 1960 | 33.275 |
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