| Year | Value | | 2022 | 3,084 | | 2021 | 2,987 | | 2020 | 2,855 | | 2019 | 2,706 | | 2018 | 2,552 | | 2017 | 2,400 | | 2016 | 2,266 | | 2015 | 2,159 | | 2014 | 2,075 | | 2013 | 2,000 | | 2012 | 1,932 | | 2011 | 1,868 | | 2010 | 1,790 | | 2009 | 1,697 | | 2008 | 1,609 | | 2007 | 1,542 | | 2006 | 1,506 | | 2005 | 1,505 | | 2004 | 1,543 | | 2003 | 1,607 | | 2002 | 1,669 | | 2001 | 1,730 | | 2000 | 1,765 | | 1999 | 1,752 | | 1998 | 1,723 | | 1997 | 1,682 | | 1996 | 1,646 | | 1995 | 1,615 | | 1994 | 1,583 | | 1993 | 1,557 | | 1992 | 1,537 | | 1991 | 1,517 | | 1990 | 1,508 | | 1989 | 1,510 | | 1988 | 1,504 | | 1987 | 1,491 | | 1986 | 1,475 | | 1985 | 1,457 | | 1984 | 1,436 | | 1983 | 1,413 | | 1982 | 1,395 | | 1981 | 1,385 | | 1980 | 1,387 | | 1979 | 1,397 | | 1978 | 1,412 | | 1977 | 1,425 | | 1976 | 1,432 | | 1975 | 1,439 | | 1974 | 1,457 | | 1973 | 1,490 | | 1972 | 1,533 | | 1971 | 1,577 | | 1970 | 1,609 | | 1969 | 1,617 | | 1968 | 1,592 | | 1967 | 1,553 | | 1966 | 1,513 | | 1965 | 1,474 | | 1964 | 1,439 | | 1963 | 1,412 | | 1962 | 1,392 | | 1961 | 1,376 | | 1960 | 1,362 |
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