| Year | Value | | 2022 | 10,806 | | 2021 | 10,735 | | 2020 | 10,615 | | 2019 | 10,277 | | 2018 | 9,682 | | 2017 | 8,971 | | 2016 | 8,242 | | 2015 | 7,571 | | 2014 | 7,014 | | 2013 | 6,616 | | 2012 | 6,364 | | 2011 | 6,192 | | 2010 | 6,064 | | 2009 | 5,932 | | 2008 | 5,772 | | 2007 | 5,590 | | 2006 | 5,390 | | 2005 | 5,180 | | 2004 | 4,969 | | 2003 | 4,770 | | 2002 | 4,590 | | 2001 | 4,431 | | 2000 | 4,290 | | 1999 | 4,154 | | 1998 | 4,014 | | 1997 | 3,876 | | 1996 | 3,747 | | 1995 | 3,631 | | 1994 | 3,527 | | 1993 | 3,432 | | 1992 | 3,350 | | 1991 | 3,272 | | 1990 | 3,201 | | 1989 | 3,135 | | 1988 | 3,076 | | 1987 | 3,021 | | 1986 | 2,961 | | 1985 | 2,890 | | 1984 | 2,805 | | 1983 | 2,709 | | 1982 | 2,581 | | 1981 | 2,438 | | 1980 | 2,330 | | 1979 | 2,280 | | 1978 | 2,276 | | 1977 | 2,300 | | 1976 | 2,364 | | 1975 | 2,451 | | 1974 | 2,537 | | 1973 | 2,625 | | 1972 | 2,708 | | 1971 | 2,792 | | 1970 | 2,881 | | 1969 | 2,956 | | 1968 | 2,989 | | 1967 | 2,996 | | 1966 | 2,997 | | 1965 | 2,987 | | 1964 | 2,966 | | 1963 | 2,934 | | 1962 | 2,892 | | 1961 | 2,852 | | 1960 | 2,817 |
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