| Year | Value | | 2022 | 6,118 | | 2021 | 5,901 | | 2020 | 5,666 | | 2019 | 5,418 | | 2018 | 5,171 | | 2017 | 4,923 | | 2016 | 4,689 | | 2015 | 4,489 | | 2014 | 4,332 | | 2013 | 4,198 | | 2012 | 4,070 | | 2011 | 3,933 | | 2010 | 3,799 | | 2009 | 3,699 | | 2008 | 3,635 | | 2007 | 3,594 | | 2006 | 3,560 | | 2005 | 3,512 | | 2004 | 3,430 | | 2003 | 3,314 | | 2002 | 3,168 | | 2001 | 3,013 | | 2000 | 2,871 | | 1999 | 2,747 | | 1998 | 2,646 | | 1997 | 2,561 | | 1996 | 2,480 | | 1995 | 2,399 | | 1994 | 2,312 | | 1993 | 2,226 | | 1992 | 2,150 | | 1991 | 2,087 | | 1990 | 2,025 | | 1989 | 1,960 | | 1988 | 1,904 | | 1987 | 1,861 | | 1986 | 1,836 | | 1985 | 1,826 | | 1984 | 1,830 | | 1983 | 1,849 | | 1982 | 1,873 | | 1981 | 1,857 | | 1980 | 1,804 | | 1979 | 1,765 | | 1978 | 1,738 | | 1977 | 1,713 | | 1976 | 1,685 | | 1975 | 1,651 | | 1974 | 1,607 | | 1973 | 1,555 | | 1972 | 1,501 | | 1971 | 1,450 | | 1970 | 1,426 | | 1969 | 1,453 | | 1968 | 1,501 | | 1967 | 1,535 | | 1966 | 1,553 | | 1965 | 1,555 | | 1964 | 1,545 | | 1963 | 1,524 | | 1962 | 1,493 | | 1961 | 1,456 | | 1960 | 1,444 |
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