| Year | Value | | 2022 | 8,084 | | 2021 | 8,183 | | 2020 | 8,373 | | 2019 | 8,573 | | 2018 | 8,689 | | 2017 | 8,624 | | 2016 | 8,408 | | 2015 | 8,144 | | 2014 | 7,881 | | 2013 | 7,635 | | 2012 | 7,418 | | 2011 | 7,240 | | 2010 | 7,103 | | 2009 | 6,998 | | 2008 | 6,925 | | 2007 | 6,883 | | 2006 | 6,857 | | 2005 | 6,844 | | 2004 | 6,843 | | 2003 | 6,847 | | 2002 | 6,803 | | 2001 | 6,712 | | 2000 | 6,626 | | 1999 | 6,539 | | 1998 | 6,453 | | 1997 | 6,368 | | 1996 | 6,267 | | 1995 | 6,136 | | 1994 | 5,994 | | 1993 | 5,844 | | 1992 | 5,635 | | 1991 | 5,380 | | 1990 | 5,151 | | 1989 | 4,968 | | 1988 | 4,828 | | 1987 | 4,734 | | 1986 | 4,661 | | 1985 | 4,587 | | 1984 | 4,519 | | 1983 | 4,352 | | 1982 | 4,093 | | 1981 | 3,857 | | 1980 | 3,624 | | 1979 | 3,388 | | 1978 | 3,155 | | 1977 | 2,931 | | 1976 | 2,719 | | 1975 | 2,520 | | 1974 | 2,330 | | 1973 | 2,201 | | 1972 | 2,130 | | 1971 | 2,062 | | 1970 | 1,996 | | 1969 | 1,931 | | 1968 | 1,868 | | 1967 | 1,809 | | 1966 | 1,752 | | 1965 | 1,696 | | 1964 | 1,642 | | 1963 | 1,589 | | 1962 | 1,538 | | 1961 | 1,488 | | 1960 | 1,440 |
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