| Year | Value | | 2022 | 6,255 | | 2021 | 5,668 | | 2020 | 5,209 | | 2019 | 4,908 | | 2018 | 4,695 | | 2017 | 4,547 | | 2016 | 4,481 | | 2015 | 4,491 | | 2014 | 4,363 | | 2013 | 4,085 | | 2012 | 3,970 | | 2011 | 3,967 | | 2010 | 3,877 | | 2009 | 3,678 | | 2008 | 3,409 | | 2007 | 3,158 | | 2006 | 2,953 | | 2005 | 2,804 | | 2004 | 2,726 | | 2003 | 2,685 | | 2002 | 2,616 | | 2001 | 2,508 | | 2000 | 2,371 | | 1999 | 2,204 | | 1998 | 2,043 | | 1997 | 1,924 | | 1996 | 1,840 | | 1995 | 1,768 | | 1994 | 1,698 | | 1993 | 1,626 | | 1992 | 1,541 | | 1991 | 1,452 | | 1990 | 1,386 | | 1989 | 1,340 | | 1988 | 1,291 | | 1987 | 1,246 | | 1986 | 1,209 | | 1985 | 1,168 | | 1984 | 1,126 | | 1983 | 1,089 | | 1982 | 1,061 | | 1981 | 1,042 | | 1980 | 1,024 | | 1979 | 996 | | 1978 | 961 | | 1977 | 927 | | 1976 | 898 | | 1975 | 878 | | 1974 | 867 | | 1973 | 860 | | 1972 | 855 | | 1971 | 845 | | 1970 | 821 | | 1969 | 785 | | 1968 | 742 | | 1967 | 686 | | 1966 | 621 | | 1965 | 555 | | 1964 | 523 | | 1963 | 523 | | 1962 | 528 | | 1961 | 535 | | 1960 | 540 |
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