| Year | Value | | 2022 | 9,193 | | 2021 | 8,661 | | 2020 | 8,166 | | 2019 | 7,711 | | 2018 | 7,356 | | 2017 | 7,154 | | 2016 | 7,106 | | 2015 | 7,138 | | 2014 | 7,120 | | 2013 | 6,973 | | 2012 | 6,673 | | 2011 | 6,274 | | 2010 | 5,856 | | 2009 | 5,515 | | 2008 | 5,349 | | 2007 | 5,390 | | 2006 | 5,583 | | 2005 | 5,832 | | 2004 | 6,008 | | 2003 | 6,044 | | 2002 | 5,906 | | 2001 | 5,690 | | 2000 | 5,584 | | 1999 | 5,630 | | 1998 | 5,629 | | 1997 | 5,503 | | 1996 | 5,362 | | 1995 | 5,215 | | 1994 | 5,068 | | 1993 | 4,927 | | 1992 | 4,798 | | 1991 | 4,676 | | 1990 | 4,563 | | 1989 | 4,473 | | 1988 | 4,397 | | 1987 | 4,325 | | 1986 | 4,260 | | 1985 | 4,201 | | 1984 | 4,144 | | 1983 | 4,093 | | 1982 | 4,044 | | 1981 | 4,003 | | 1980 | 3,953 | | 1979 | 3,855 | | 1978 | 3,719 | | 1977 | 3,579 | | 1976 | 3,442 | | 1975 | 3,314 | | 1974 | 3,195 | | 1973 | 3,083 | | 1972 | 2,980 | | 1971 | 2,883 | | 1970 | 2,788 | | 1969 | 2,691 | | 1968 | 2,591 | | 1967 | 2,494 | | 1966 | 2,399 | | 1965 | 2,304 | | 1964 | 2,217 | | 1963 | 2,140 | | 1962 | 2,071 | | 1961 | 2,005 | | 1960 | 1,941 |
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