| Year | Value | | 2022 | 7,429 | | 2021 | 7,137 | | 2020 | 6,814 | | 2019 | 6,509 | | 2018 | 6,259 | | 2017 | 6,058 | | 2016 | 5,893 | | 2015 | 5,715 | | 2014 | 5,479 | | 2013 | 5,225 | | 2012 | 4,947 | | 2011 | 4,651 | | 2010 | 4,416 | | 2009 | 4,234 | | 2008 | 4,052 | | 2007 | 3,955 | | 2006 | 3,962 | | 2005 | 3,940 | | 2004 | 3,863 | | 2003 | 3,826 | | 2002 | 3,814 | | 2001 | 3,785 | | 2000 | 3,797 | | 1999 | 3,839 | | 1998 | 3,837 | | 1997 | 3,767 | | 1996 | 3,687 | | 1995 | 3,619 | | 1994 | 3,554 | | 1993 | 3,535 | | 1992 | 3,563 | | 1991 | 3,614 | | 1990 | 3,671 | | 1989 | 3,743 | | 1988 | 3,866 | | 1987 | 4,037 | | 1986 | 4,220 | | 1985 | 4,368 | | 1984 | 4,459 | | 1983 | 4,469 | | 1982 | 4,399 | | 1981 | 4,291 | | 1980 | 4,174 | | 1979 | 4,053 | | 1978 | 3,938 | | 1977 | 3,835 | | 1976 | 3,734 | | 1975 | 3,631 | | 1974 | 3,534 | | 1973 | 3,444 | | 1972 | 3,359 | | 1971 | 3,276 | | 1970 | 3,195 | | 1969 | 3,123 | | 1968 | 3,062 | | 1967 | 2,999 | | 1966 | 2,894 | | 1965 | 2,723 | | 1964 | 2,488 | | 1963 | 2,185 | | 1962 | 1,842 | | 1961 | 1,542 | | 1960 | 1,361 |
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