Year | Value | 2022 | 71.354 | 2021 | 71.119 | 2020 | 70.893 | 2019 | 70.678 | 2018 | 70.473 | 2017 | 70.278 | 2016 | 70.094 | 2015 | 69.921 | 2014 | 69.758 | 2013 | 69.595 | 2012 | 69.432 | 2011 | 69.268 | 2010 | 69.103 | 2009 | 68.98 | 2008 | 68.927 | 2007 | 68.873 | 2006 | 68.819 | 2005 | 68.766 | 2004 | 68.712 | 2003 | 68.658 | 2002 | 68.604 | 2001 | 68.55 | 2000 | 68.496 | 1999 | 68.442 | 1998 | 68.388 | 1997 | 68.405 | 1996 | 68.593 | 1995 | 68.78 | 1994 | 68.966 | 1993 | 69.152 | 1992 | 69.337 | 1991 | 69.522 | 1990 | 69.706 | 1989 | 69.889 | 1988 | 70.072 | 1987 | 70.017 | 1986 | 69.396 | 1985 | 68.767 | 1984 | 68.132 | 1983 | 67.488 | 1982 | 66.839 | 1981 | 66.183 | 1980 | 65.521 | 1979 | 64.852 | 1978 | 64.178 | 1977 | 63.404 | 1976 | 62.398 | 1975 | 61.379 | 1974 | 60.351 | 1973 | 59.313 | 1972 | 58.269 | 1971 | 57.214 | 1970 | 56.154 | 1969 | 55.089 | 1968 | 54.02 | 1967 | 52.945 | 1966 | 51.868 | 1965 | 50.651 | 1964 | 49.093 | 1963 | 47.532 | 1962 | 45.978 | 1961 | 44.432 | 1960 | 42.899 |
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