| Year | Value | | 2022 | 7,809 | | 2021 | 7,742 | | 2020 | 7,605 | | 2019 | 7,424 | | 2018 | 7,202 | | 2017 | 6,952 | | 2016 | 6,703 | | 2015 | 6,462 | | 2014 | 6,239 | | 2013 | 6,000 | | 2012 | 5,807 | | 2011 | 5,646 | | 2010 | 5,496 | | 2009 | 5,373 | | 2008 | 5,295 | | 2007 | 5,229 | | 2006 | 5,129 | | 2005 | 5,062 | | 2004 | 4,963 | | 2003 | 4,772 | | 2002 | 4,586 | | 2001 | 4,414 | | 2000 | 4,267 | | 1999 | 4,130 | | 1998 | 3,989 | | 1997 | 3,844 | | 1996 | 3,695 | | 1995 | 3,540 | | 1994 | 3,378 | | 1993 | 3,218 | | 1992 | 3,077 | | 1991 | 2,955 | | 1990 | 2,846 | | 1989 | 2,773 | | 1988 | 2,721 | | 1987 | 2,641 | | 1986 | 2,541 | | 1985 | 2,430 | | 1984 | 2,310 | | 1983 | 2,190 | | 1982 | 2,086 | | 1981 | 1,997 | | 1980 | 1,927 | | 1979 | 1,885 | | 1978 | 1,868 | | 1977 | 1,862 | | 1976 | 1,863 | | 1975 | 1,894 | | 1974 | 1,955 | | 1973 | 2,012 | | 1972 | 2,054 | | 1971 | 2,032 | | 1970 | 1,935 | | 1969 | 1,824 | | 1968 | 1,766 | | 1967 | 1,712 | | 1966 | 1,646 | | 1965 | 1,577 | | 1964 | 1,517 | | 1963 | 1,456 | | 1962 | 1,396 | | 1961 | 1,340 | | 1960 | 1,287 |
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