| Year | Value | | 2022 | 12,384 | | 2021 | 12,020 | | 2020 | 11,702 | | 2019 | 11,407 | | 2018 | 11,119 | | 2017 | 10,854 | | 2016 | 10,593 | | 2015 | 10,329 | | 2014 | 10,056 | | 2013 | 9,755 | | 2012 | 9,421 | | 2011 | 9,080 | | 2010 | 8,749 | | 2009 | 8,445 | | 2008 | 8,189 | | 2007 | 7,958 | | 2006 | 7,717 | | 2005 | 7,454 | | 2004 | 7,160 | | 2003 | 6,838 | | 2002 | 6,504 | | 2001 | 6,170 | | 2000 | 5,816 | | 1999 | 5,436 | | 1998 | 5,053 | | 1997 | 4,691 | | 1996 | 4,371 | | 1995 | 4,113 | | 1994 | 3,938 | | 1993 | 3,828 | | 1992 | 3,724 | | 1991 | 3,554 | | 1990 | 3,320 | | 1989 | 3,079 | | 1988 | 2,867 | | 1987 | 2,713 | | 1986 | 2,622 | | 1985 | 2,576 | | 1984 | 2,561 | | 1983 | 2,566 | | 1982 | 2,563 | | 1981 | 2,540 | | 1980 | 2,505 | | 1979 | 2,470 | | 1978 | 2,442 | | 1977 | 2,424 | | 1976 | 2,418 | | 1975 | 2,421 | | 1974 | 2,430 | | 1973 | 2,439 | | 1972 | 2,438 | | 1971 | 2,419 | | 1970 | 2,386 | | 1969 | 2,344 | | 1968 | 2,289 | | 1967 | 2,230 | | 1966 | 2,178 | | 1965 | 2,132 | | 1964 | 2,084 | | 1963 | 2,039 | | 1962 | 1,995 | | 1961 | 1,956 | | 1960 | 1,927 |
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