| Year | Value | | 2022 | 9,539 | | 2021 | 9,056 | | 2020 | 8,606 | | 2019 | 8,210 | | 2018 | 7,922 | | 2017 | 7,779 | | 2016 | 7,757 | | 2015 | 7,776 | | 2014 | 7,706 | | 2013 | 7,464 | | 2012 | 7,034 | | 2011 | 6,476 | | 2010 | 5,895 | | 2009 | 5,420 | | 2008 | 5,168 | | 2007 | 5,168 | | 2006 | 5,356 | | 2005 | 5,612 | | 2004 | 5,794 | | 2003 | 5,815 | | 2002 | 5,545 | | 2001 | 5,091 | | 2000 | 4,742 | | 1999 | 4,567 | | 1998 | 4,462 | | 1997 | 4,343 | | 1996 | 4,230 | | 1995 | 4,124 | | 1994 | 4,027 | | 1993 | 3,940 | | 1992 | 3,867 | | 1991 | 3,786 | | 1990 | 3,706 | | 1989 | 3,655 | | 1988 | 3,624 | | 1987 | 3,605 | | 1986 | 3,594 | | 1985 | 3,584 | | 1984 | 3,573 | | 1983 | 3,558 | | 1982 | 3,537 | | 1981 | 3,521 | | 1980 | 3,512 | | 1979 | 3,491 | | 1978 | 3,449 | | 1977 | 3,395 | | 1976 | 3,332 | | 1975 | 3,267 | | 1974 | 3,193 | | 1973 | 3,112 | | 1972 | 3,030 | | 1971 | 2,947 | | 1970 | 2,860 | | 1969 | 2,772 | | 1968 | 2,683 | | 1967 | 2,597 | | 1966 | 2,517 | | 1965 | 2,440 | | 1964 | 2,369 | | 1963 | 2,304 | | 1962 | 2,243 | | 1961 | 2,189 | | 1960 | 2,137 |
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