| Year | Value | | 2022 | 13,332 | | 2021 | 12,650 | | 2020 | 11,901 | | 2019 | 11,288 | | 2018 | 10,907 | | 2017 | 10,617 | | 2016 | 10,443 | | 2015 | 10,372 | | 2014 | 10,148 | | 2013 | 9,764 | | 2012 | 9,422 | | 2011 | 9,132 | | 2010 | 8,899 | | 2009 | 8,738 | | 2008 | 8,583 | | 2007 | 8,366 | | 2006 | 8,083 | | 2005 | 7,765 | | 2004 | 7,433 | | 2003 | 7,085 | | 2002 | 6,734 | | 2001 | 6,390 | | 2000 | 6,060 | | 1999 | 5,750 | | 1998 | 5,474 | | 1997 | 5,239 | | 1996 | 5,032 | | 1995 | 4,858 | | 1994 | 4,728 | | 1993 | 4,634 | | 1992 | 4,575 | | 1991 | 4,552 | | 1990 | 4,544 | | 1989 | 4,530 | | 1988 | 4,514 | | 1987 | 4,487 | | 1986 | 4,437 | | 1985 | 4,353 | | 1984 | 4,246 | | 1983 | 4,122 | | 1982 | 3,983 | | 1981 | 3,826 | | 1980 | 3,652 | | 1979 | 3,467 | | 1978 | 3,285 | | 1977 | 3,122 | | 1976 | 2,986 | | 1975 | 2,878 | | 1974 | 2,794 | | 1973 | 2,728 | | 1972 | 2,660 | | 1971 | 2,586 | | 1970 | 2,518 | | 1969 | 2,449 | | 1968 | 2,373 | | 1967 | 2,298 | | 1966 | 2,226 | | 1965 | 2,147 | | 1964 | 2,058 | | 1963 | 1,972 | | 1962 | 1,899 | | 1961 | 1,836 | | 1960 | 1,781 |
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