Year | Value | 2022 | 58.733 | 2021 | 58.148 | 2020 | 57.56 | 2019 | 56.968 | 2018 | 56.374 | 2017 | 55.777 | 2016 | 55.179 | 2015 | 54.578 | 2014 | 53.976 | 2013 | 53.373 | 2012 | 52.769 | 2011 | 52.164 | 2010 | 51.559 | 2009 | 50.954 | 2008 | 50.35 | 2007 | 49.746 | 2006 | 49.143 | 2005 | 48.541 | 2004 | 47.94 | 2003 | 47.338 | 2002 | 46.738 | 2001 | 46.139 | 2000 | 45.542 | 1999 | 44.944 | 1998 | 44.348 | 1997 | 43.755 | 1996 | 43.164 | 1995 | 42.573 | 1994 | 41.985 | 1993 | 41.399 | 1992 | 40.817 | 1991 | 40.235 | 1990 | 39.657 | 1989 | 39.082 | 1988 | 38.511 | 1987 | 37.941 | 1986 | 37.124 | 1985 | 36.232 | 1984 | 35.35 | 1983 | 34.476 | 1982 | 33.613 | 1981 | 32.761 | 1980 | 31.921 | 1979 | 31.091 | 1978 | 30.274 | 1977 | 29.469 | 1976 | 28.678 | 1975 | 27.292 | 1974 | 25.78 | 1973 | 24.324 | 1972 | 22.927 | 1971 | 21.584 | 1970 | 20.3 | 1969 | 19.577 | 1968 | 18.875 | 1967 | 18.19 | 1966 | 17.525 | 1965 | 16.88 | 1964 | 16.255 | 1963 | 15.647 | 1962 | 15.058 | 1961 | 14.488 | 1960 | 13.937 |
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