| Year | Value | | 2022 | 9,841 | | 2021 | 9,470 | | 2020 | 9,118 | | 2019 | 8,801 | | 2018 | 8,571 | | 2017 | 8,427 | | 2016 | 8,301 | | 2015 | 8,179 | | 2014 | 8,056 | | 2013 | 7,863 | | 2012 | 7,593 | | 2011 | 7,310 | | 2010 | 7,039 | | 2009 | 6,761 | | 2008 | 6,478 | | 2007 | 6,215 | | 2006 | 5,973 | | 2005 | 5,747 | | 2004 | 5,539 | | 2003 | 5,351 | | 2002 | 5,177 | | 2001 | 5,020 | | 2000 | 4,886 | | 1999 | 4,774 | | 1998 | 4,676 | | 1997 | 4,589 | | 1996 | 4,507 | | 1995 | 4,429 | | 1994 | 4,358 | | 1993 | 4,289 | | 1992 | 4,222 | | 1991 | 4,152 | | 1990 | 4,075 | | 1989 | 3,983 | | 1988 | 3,891 | | 1987 | 3,786 | | 1986 | 3,652 | | 1985 | 3,511 | | 1984 | 3,374 | | 1983 | 3,233 | | 1982 | 3,103 | | 1981 | 3,009 | | 1980 | 2,939 | | 1979 | 2,910 | | 1978 | 2,895 | | 1977 | 2,851 | | 1976 | 2,796 | | 1975 | 2,733 | | 1974 | 2,664 | | 1973 | 2,592 | | 1972 | 2,517 | | 1971 | 2,443 | | 1970 | 2,373 | | 1969 | 2,306 | | 1968 | 2,245 | | 1967 | 2,188 | | 1966 | 2,135 | | 1965 | 2,086 | | 1964 | 2,039 | | 1963 | 1,996 | | 1962 | 1,956 | | 1961 | 1,916 | | 1960 | 1,875 |
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