Year | Value | 2022 | 45.437 | 2021 | 44.677 | 2020 | 43.909 | 2019 | 43.136 | 2018 | 42.356 | 2017 | 41.572 | 2016 | 40.783 | 2015 | 39.991 | 2014 | 39.196 | 2013 | 38.398 | 2012 | 37.599 | 2011 | 36.799 | 2010 | 35.999 | 2009 | 35.2 | 2008 | 34.403 | 2007 | 33.612 | 2006 | 32.832 | 2005 | 32.06 | 2004 | 31.3 | 2003 | 30.547 | 2002 | 29.806 | 2001 | 29.075 | 2000 | 28.356 | 1999 | 27.646 | 1998 | 26.948 | 1997 | 26.434 | 1996 | 25.975 | 1995 | 25.519 | 1994 | 25.069 | 1993 | 24.624 | 1992 | 24.186 | 1991 | 23.751 | 1990 | 23.322 | 1989 | 22.899 | 1988 | 22.482 | 1987 | 22.069 | 1986 | 21.548 | 1985 | 21.013 | 1984 | 20.488 | 1983 | 19.972 | 1982 | 19.466 | 1981 | 18.97 | 1980 | 18.484 | 1979 | 18.007 | 1978 | 17.54 | 1977 | 17.083 | 1976 | 16.651 | 1975 | 16.244 | 1974 | 15.845 | 1973 | 15.454 | 1972 | 15.072 | 1971 | 14.697 | 1970 | 14.33 | 1969 | 13.971 | 1968 | 13.619 | 1967 | 13.274 | 1966 | 12.938 | 1965 | 12.608 | 1964 | 12.286 | 1963 | 11.97 | 1962 | 11.662 | 1961 | 11.361 | 1960 | 11.066 |
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