Year | Value | 2022 | 68.081 | 2021 | 67.46 | 2020 | 66.825 | 2019 | 66.177 | 2018 | 65.514 | 2017 | 64.839 | 2016 | 64.149 | 2015 | 63.446 | 2014 | 62.731 | 2013 | 62.002 | 2012 | 61.268 | 2011 | 60.528 | 2010 | 59.783 | 2009 | 59.034 | 2008 | 58.282 | 2007 | 57.524 | 2006 | 56.764 | 2005 | 56 | 2004 | 54.827 | 2003 | 53.645 | 2002 | 52.461 | 2001 | 51.274 | 2000 | 50.087 | 1999 | 48.897 | 1998 | 47.71 | 1997 | 46.525 | 1996 | 45.346 | 1995 | 44.169 | 1994 | 43 | 1993 | 41.511 | 1992 | 40.039 | 1991 | 38.58 | 1990 | 37.144 | 1989 | 35.731 | 1988 | 34.343 | 1987 | 32.978 | 1986 | 31.643 | 1985 | 30.338 | 1984 | 29.065 | 1983 | 27.821 | 1982 | 26.612 | 1981 | 25.437 | 1980 | 24.298 | 1979 | 23.192 | 1978 | 22.122 | 1977 | 21.088 | 1976 | 20.092 | 1975 | 19.128 | 1974 | 18.202 | 1973 | 17.31 | 1972 | 16.455 | 1971 | 15.632 | 1970 | 14.957 | 1969 | 14.436 | 1968 | 13.932 | 1967 | 13.441 | 1966 | 12.965 | 1965 | 12.504 | 1964 | 12.058 | 1963 | 11.624 | 1962 | 11.204 | 1961 | 10.798 | 1960 | 10.435 |
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