| Year | Value | | 2022 | 4,689 | | 2021 | 4,653 | | 2020 | 4,633 | | 2019 | 4,501 | | 2018 | 4,621 | | 2017 | 4,842 | | 2016 | 4,712 | | 2015 | 4,549 | | 2014 | 4,382 | | 2013 | 4,221 | | 2012 | 4,075 | | 2011 | 3,926 | | 2010 | 3,728 | | 2009 | 3,528 | | 2008 | 3,354 | | 2007 | 3,174 | | 2006 | 3,006 | | 2005 | 2,869 | | 2004 | 2,775 | | 2003 | 2,718 | | 2002 | 2,646 | | 2001 | 2,601 | | 2000 | 2,619 | | 1999 | 2,613 | | 1998 | 2,579 | | 1997 | 2,500 | | 1996 | 2,378 | | 1995 | 2,262 | | 1994 | 2,169 | | 1993 | 2,095 | | 1992 | 2,036 | | 1991 | 2,005 | | 1990 | 1,990 | | 1989 | 1,984 | | 1988 | 1,986 | | 1987 | 1,974 | | 1986 | 1,934 | | 1985 | 1,869 | | 1984 | 1,796 | | 1983 | 1,738 | | 1982 | 1,707 | | 1981 | 1,708 | | 1980 | 1,745 | | 1979 | 1,797 | | 1978 | 1,851 | | 1977 | 1,886 | | 1976 | 1,870 | | 1975 | 1,820 | | 1974 | 1,742 | | 1973 | 1,649 | | 1972 | 1,599 | | 1971 | 1,574 | | 1970 | 1,550 | | 1969 | 1,542 | | 1968 | 1,541 | | 1967 | 1,533 | | 1966 | 1,523 | | 1965 | 1,507 | | 1964 | 1,471 | | 1963 | 1,425 | | 1962 | 1,372 | | 1961 | 1,319 | | 1960 | 1,285 |
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