Year | Value | 2022 | 74.772 | 2021 | 74.261 | 2020 | 73.733 | 2019 | 73.189 | 2018 | 72.629 | 2017 | 72.052 | 2016 | 71.459 | 2015 | 70.848 | 2014 | 70.221 | 2013 | 69.576 | 2012 | 68.915 | 2011 | 68.236 | 2010 | 67.54 | 2009 | 66.826 | 2008 | 66.097 | 2007 | 65.348 | 2006 | 64.593 | 2005 | 63.83 | 2004 | 63.061 | 2003 | 62.284 | 2002 | 61.501 | 2001 | 60.712 | 2000 | 59.919 | 1999 | 59.118 | 1998 | 58.313 | 1997 | 57.544 | 1996 | 56.774 | 1995 | 55.997 | 1994 | 55.219 | 1993 | 54.439 | 1992 | 53.657 | 1991 | 52.871 | 1990 | 52.085 | 1989 | 51.298 | 1988 | 50.511 | 1987 | 49.722 | 1986 | 48.86 | 1985 | 47.968 | 1984 | 47.079 | 1983 | 46.189 | 1982 | 45.303 | 1981 | 44.42 | 1980 | 43.542 | 1979 | 42.665 | 1978 | 41.794 | 1977 | 40.928 | 1976 | 40.497 | 1975 | 40.33 | 1974 | 40.163 | 1973 | 39.997 | 1972 | 39.831 | 1971 | 39.665 | 1970 | 39.5 | 1969 | 39.334 | 1968 | 39.169 | 1967 | 39.004 | 1966 | 38.84 | 1965 | 37.643 | 1964 | 36.141 | 1963 | 34.662 | 1962 | 33.214 | 1961 | 31.797 | 1960 | 30.51 |
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