Year | Value | 2021 | 78.564 | 2020 | 78.672 | 2019 | 78.857 | 2018 | 78.709 | 2017 | 78.56 | 2016 | 78.41 | 2015 | 77.052 | 2014 | 78.11 | 2013 | 77.184 | 2012 | 77.04 | 2011 | 76.886 | 2010 | 76.615 | 2009 | 76.332 | 2008 | 76.057 | 2007 | 77.24 | 2006 | 76.655 | 2005 | 75.403 | 2004 | 74.695 | 2003 | 74.564 | 2002 | 72.921 | 2001 | 73.425 | 2000 | 72.08 | 1999 | 71.042 | 1998 | 72.4 | 1997 | 70.232 | 1996 | 70.564 | 1995 | 70.158 | 1994 | 69.907 | 1993 | 68.91 | 1992 | 68.886 | 1991 | 67.651 | 1990 | 67.563 | 1989 | 66.627 | 1988 | 66.931 | 1987 | 66.253 | 1986 | 65.8 | 1985 | 64.859 | 1984 | 65.268 | 1983 | 65.094 | 1982 | 64.413 | 1981 | 64.374 | 1980 | 63.524 | 1979 | 63.099 | 1978 | 62.643 | 1977 | 62.309 | 1976 | 62.248 | 1975 | 61.92 | 1974 | 60.814 | 1973 | 61.553 | 1972 | 60.162 | 1971 | 60.779 | 1970 | 60.461 | 1969 | 59.891 | 1968 | 60.411 | 1967 | 60.776 | 1966 | 60.024 | 1965 | 59.609 | 1964 | 59.429 | 1963 | 58.037 | 1962 | 58.982 | 1961 | 58.202 | 1960 | 59.195 |
|