| Year | Value | | 2022 | 11,729 | | 2021 | 11,121 | | 2020 | 10,463 | | 2019 | 9,910 | | 2018 | 9,538 | | 2017 | 9,228 | | 2016 | 9,028 | | 2015 | 8,955 | | 2014 | 8,785 | | 2013 | 8,498 | | 2012 | 8,251 | | 2011 | 8,027 | | 2010 | 7,836 | | 2009 | 7,686 | | 2008 | 7,543 | | 2007 | 7,338 | | 2006 | 7,083 | | 2005 | 6,834 | | 2004 | 6,594 | | 2003 | 6,355 | | 2002 | 6,127 | | 2001 | 5,899 | | 2000 | 5,660 | | 1999 | 5,421 | | 1998 | 5,186 | | 1997 | 4,966 | | 1996 | 4,792 | | 1995 | 4,680 | | 1994 | 4,600 | | 1993 | 4,535 | | 1992 | 4,489 | | 1991 | 4,482 | | 1990 | 4,488 | | 1989 | 4,491 | | 1988 | 4,514 | | 1987 | 4,542 | | 1986 | 4,483 | | 1985 | 4,368 | | 1984 | 4,295 | | 1983 | 4,229 | | 1982 | 4,152 | | 1981 | 4,053 | | 1980 | 3,929 | | 1979 | 3,781 | | 1978 | 3,617 | | 1977 | 3,446 | | 1976 | 3,294 | | 1975 | 3,166 | | 1974 | 3,046 | | 1973 | 2,946 | | 1972 | 2,855 | | 1971 | 2,768 | | 1970 | 2,699 | | 1969 | 2,650 | | 1968 | 2,611 | | 1967 | 2,586 | | 1966 | 2,581 | | 1965 | 2,581 | | 1964 | 2,571 | | 1963 | 2,561 | | 1962 | 2,562 | | 1961 | 2,572 | | 1960 | 2,585 |
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