| Year | Value | | 2022 | 12,072 | | 2021 | 11,857 | | 2020 | 11,666 | | 2019 | 11,451 | | 2018 | 11,188 | | 2017 | 10,873 | | 2016 | 10,545 | | 2015 | 10,212 | | 2014 | 9,870 | | 2013 | 9,535 | | 2012 | 9,213 | | 2011 | 8,915 | | 2010 | 8,659 | | 2009 | 8,443 | | 2008 | 8,256 | | 2007 | 8,085 | | 2006 | 7,924 | | 2005 | 7,834 | | 2004 | 7,868 | | 2003 | 7,931 | | 2002 | 7,927 | | 2001 | 7,859 | | 2000 | 7,730 | | 1999 | 7,546 | | 1998 | 7,306 | | 1997 | 7,056 | | 1996 | 6,820 | | 1995 | 6,583 | | 1994 | 6,397 | | 1993 | 6,280 | | 1992 | 6,453 | | 1991 | 6,582 | | 1990 | 6,356 | | 1989 | 6,083 | | 1988 | 5,808 | | 1987 | 5,540 | | 1986 | 5,283 | | 1985 | 5,036 | | 1984 | 4,800 | | 1983 | 4,577 | | 1982 | 4,367 | | 1981 | 4,169 | | 1980 | 3,980 | | 1979 | 3,800 | | 1978 | 3,628 | | 1977 | 3,465 | | 1976 | 3,313 | | 1975 | 3,171 | | 1974 | 3,039 | | 1973 | 2,915 | | 1972 | 2,799 | | 1971 | 2,690 | | 1970 | 2,586 | | 1969 | 2,489 | | 1968 | 2,397 | | 1967 | 2,313 | | 1966 | 2,235 | | 1965 | 2,162 | | 1964 | 2,094 | | 1963 | 2,033 | | 1962 | 1,976 | | 1961 | 1,924 | | 1960 | 1,879 |
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