| Year | Value | | 2022 | 12,554 | | 2021 | 12,136 | | 2020 | 11,683 | | 2019 | 11,151 | | 2018 | 10,533 | | 2017 | 9,857 | | 2016 | 9,204 | | 2015 | 8,632 | | 2014 | 8,157 | | 2013 | 7,836 | | 2012 | 7,679 | | 2011 | 7,641 | | 2010 | 7,636 | | 2009 | 7,572 | | 2008 | 7,366 | | 2007 | 6,993 | | 2006 | 6,511 | | 2005 | 6,014 | | 2004 | 5,606 | | 2003 | 5,453 | | 2002 | 5,664 | | 2001 | 6,041 | | 2000 | 6,317 | | 1999 | 6,426 | | 1998 | 6,461 | | 1997 | 6,494 | | 1996 | 6,494 | | 1995 | 6,455 | | 1994 | 6,380 | | 1993 | 6,267 | | 1992 | 6,122 | | 1991 | 5,964 | | 1990 | 5,807 | | 1989 | 5,657 | | 1988 | 5,518 | | 1987 | 5,391 | | 1986 | 5,277 | | 1985 | 5,175 | | 1984 | 5,080 | | 1983 | 4,992 | | 1982 | 4,909 | | 1981 | 4,832 | | 1980 | 4,744 | | 1979 | 4,617 | | 1978 | 4,470 | | 1977 | 4,329 | | 1976 | 4,195 | | 1975 | 4,071 | | 1974 | 3,951 | | 1973 | 3,837 | | 1972 | 3,731 | | 1971 | 3,634 | | 1970 | 3,544 | | 1969 | 3,461 | | 1968 | 3,382 | | 1967 | 3,313 | | 1966 | 3,247 | | 1965 | 3,167 | | 1964 | 3,075 | | 1963 | 2,971 | | 1962 | 2,859 | | 1961 | 2,744 | | 1960 | 2,634 |
|