Year | Value | 2022 | 2.268 | 2021 | 2.38 | 2020 | 2.501 | 2019 | 2.632 | 2018 | 2.774 | 2017 | 2.928 | 2016 | 3.09 | 2015 | 3.261 | 2014 | 3.441 | 2013 | 3.63 | 2012 | 3.829 | 2011 | 4.039 | 2010 | 4.26 | 2009 | 4.492 | 2008 | 4.736 | 2007 | 4.993 | 2006 | 5.264 | 2005 | 5.547 | 2004 | 5.845 | 2003 | 6.025 | 2002 | 6.075 | 2001 | 6.25 | 2000 | 6.56 | 1999 | 6.885 | 1998 | 7.224 | 1997 | 7.578 | 1996 | 7.948 | 1995 | 8.336 | 1994 | 8.739 | 1993 | 9.161 | 1992 | 9.6 | 1991 | 9.6 | 1990 | 9.6 | 1989 | 9.6 | 1988 | 9.6 | 1987 | 9.6 | 1986 | 10.608 | 1985 | 11.709 | 1984 | 12.905 | 1983 | 14.208 | 1982 | 15.616 | 1981 | 17.136 | 1980 | 18.769 | 1979 | 20.525 | 1978 | 22.396 | 1977 | 24.385 | 1976 | 26.434 | 1975 | 28.516 | 1974 | 30.691 | 1973 | 32.954 | 1972 | 35.297 | 1971 | 37.719 | 1970 | 40.2 | 1969 | 41.265 | 1968 | 42.337 | 1967 | 43.419 | 1966 | 44.506 | 1965 | 45.598 | 1964 | 46.693 | 1963 | 47.794 | 1962 | 48.896 | 1961 | 49.999 | 1960 | 51.1 |
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