| Year | Value | | 2022 | 3,519 | | 2021 | 3,611 | | 2020 | 3,699 | | 2019 | 3,767 | | 2018 | 3,808 | | 2017 | 3,841 | | 2016 | 3,869 | | 2015 | 3,892 | | 2014 | 3,918 | | 2013 | 3,939 | | 2012 | 3,942 | | 2011 | 3,923 | | 2010 | 3,873 | | 2009 | 3,792 | | 2008 | 3,698 | | 2007 | 3,611 | | 2006 | 3,558 | | 2005 | 3,558 | | 2004 | 3,593 | | 2003 | 3,648 | | 2002 | 3,723 | | 2001 | 3,803 | | 2000 | 3,855 | | 1999 | 3,890 | | 1998 | 3,933 | | 1997 | 3,938 | | 1996 | 3,864 | | 1995 | 3,742 | | 1994 | 3,568 | | 1993 | 3,326 | | 1992 | 3,105 | | 1991 | 2,931 | | 1990 | 2,757 | | 1989 | 2,511 | | 1988 | 2,352 | | 1987 | 2,205 | | 1986 | 2,058 | | 1985 | 1,947 | | 1984 | 1,883 | | 1983 | 1,830 | | 1982 | 1,770 | | 1981 | 1,734 | | 1980 | 1,709 | | 1979 | 1,634 | | 1978 | 1,642 | | 1977 | 1,614 | | 1976 | 1,682 | | 1975 | 1,672 | | 1974 | 1,609 | | 1973 | 1,517 | | 1972 | 1,393 | | 1971 | 1,313 | | 1970 | 1,189 | | 1969 | 1,158 | | 1968 | 1,116 | | 1967 | 1,032 | | 1966 | 1,018 | | 1965 | 1,002 | | 1964 | 951 | | 1963 | 903 | | 1962 | 764 | | 1961 | 718 | | 1960 | 632 |
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