| Year | Value | | 2022 | 10,348 | | 2021 | 9,951 | | 2020 | 9,581 | | 2019 | 9,227 | | 2018 | 8,895 | | 2017 | 8,575 | | 2016 | 8,270 | | 2015 | 7,990 | | 2014 | 7,728 | | 2013 | 7,475 | | 2012 | 7,233 | | 2011 | 7,008 | | 2010 | 6,808 | | 2009 | 6,636 | | 2008 | 6,436 | | 2007 | 6,223 | | 2006 | 5,985 | | 2005 | 5,768 | | 2004 | 5,626 | | 2003 | 5,494 | | 2002 | 5,393 | | 2001 | 5,306 | | 2000 | 5,203 | | 1999 | 5,073 | | 1998 | 4,918 | | 1997 | 4,748 | | 1996 | 4,577 | | 1995 | 4,403 | | 1994 | 4,202 | | 1993 | 4,172 | | 1992 | 4,172 | | 1991 | 4,015 | | 1990 | 3,862 | | 1989 | 3,713 | | 1988 | 3,565 | | 1987 | 3,426 | | 1986 | 3,298 | | 1985 | 3,178 | | 1984 | 3,065 | | 1983 | 2,954 | | 1982 | 2,854 | | 1981 | 2,766 | | 1980 | 2,692 | | 1979 | 2,634 | | 1978 | 2,591 | | 1977 | 2,558 | | 1976 | 2,534 | | 1975 | 2,521 | | 1974 | 2,518 | | 1973 | 2,528 | | 1972 | 2,545 | | 1971 | 2,558 | | 1970 | 2,557 | | 1969 | 2,535 | | 1968 | 2,490 | | 1967 | 2,433 | | 1966 | 2,382 | | 1965 | 2,347 | | 1964 | 2,330 | | 1963 | 2,323 | | 1962 | 2,321 | | 1961 | 2,322 | | 1960 | 2,327 |
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