Year | Value | 2021 | 74.884 | 2020 | 75.938 | 2019 | 75.76 | 2018 | 75.644 | 2017 | 75.476 | 2016 | 75.289 | 2015 | 75.094 | 2014 | 75.146 | 2013 | 75.035 | 2012 | 74.944 | 2011 | 74.746 | 2010 | 74.442 | 2009 | 74.227 | 2008 | 74.25 | 2007 | 74.211 | 2006 | 74.164 | 2005 | 74.096 | 2004 | 73.898 | 2003 | 73.796 | 2002 | 73.563 | 2001 | 73.344 | 2000 | 72.775 | 1999 | 72.283 | 1998 | 72.168 | 1997 | 72.284 | 1996 | 72.327 | 1995 | 72.384 | 1994 | 72.163 | 1993 | 71.826 | 1992 | 71.526 | 1991 | 71.442 | 1990 | 71.307 | 1989 | 71.117 | 1988 | 70.896 | 1987 | 70.666 | 1986 | 70.458 | 1985 | 70.318 | 1984 | 69.937 | 1983 | 69.567 | 1982 | 69.24 | 1981 | 68.852 | 1980 | 68.245 | 1979 | 67.762 | 1978 | 67.285 | 1977 | 66.811 | 1976 | 66.277 | 1975 | 65.712 | 1974 | 65.209 | 1973 | 64.62 | 1972 | 64.083 | 1971 | 63.584 | 1970 | 63.111 | 1969 | 62.644 | 1968 | 62.194 | 1967 | 61.797 | 1966 | 61.375 | 1965 | 60.95 | 1964 | 60.063 | 1963 | 59.26 | 1962 | 58.404 | 1961 | 57.434 | 1960 | 56.502 |
|