| Year | Value | | 2022 | 11,819 | | 2021 | 11,218 | | 2020 | 10,607 | | 2019 | 9,998 | | 2018 | 9,458 | | 2017 | 9,027 | | 2016 | 8,696 | | 2015 | 8,421 | | 2014 | 8,168 | | 2013 | 7,879 | | 2012 | 7,501 | | 2011 | 7,083 | | 2010 | 6,705 | | 2009 | 6,408 | | 2008 | 6,242 | | 2007 | 6,220 | | 2006 | 6,279 | | 2005 | 6,359 | | 2004 | 6,440 | | 2003 | 6,336 | | 2002 | 6,039 | | 2001 | 5,755 | | 2000 | 5,524 | | 1999 | 5,336 | | 1998 | 5,169 | | 1997 | 4,996 | | 1996 | 4,792 | | 1995 | 4,552 | | 1994 | 4,393 | | 1993 | 4,347 | | 1992 | 4,301 | | 1991 | 4,243 | | 1990 | 4,192 | | 1989 | 4,137 | | 1988 | 4,067 | | 1987 | 4,004 | | 1986 | 3,933 | | 1985 | 3,827 | | 1984 | 3,698 | | 1983 | 3,562 | | 1982 | 3,435 | | 1981 | 3,335 | | 1980 | 3,289 | | 1979 | 3,299 | | 1978 | 3,350 | | 1977 | 3,434 | | 1976 | 3,533 | | 1975 | 3,631 | | 1974 | 3,724 | | 1973 | 3,805 | | 1972 | 3,858 | | 1971 | 3,787 | | 1970 | 3,605 | | 1969 | 3,422 | | 1968 | 3,262 | | 1967 | 3,133 | | 1966 | 3,050 | | 1965 | 3,025 | | 1964 | 3,052 | | 1963 | 3,098 | | 1962 | 3,095 | | 1961 | 3,045 | | 1960 | 2,993 |
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