| Year | Value | | 2022 | 11,210 | | 2021 | 10,748 | | 2020 | 10,295 | | 2019 | 9,836 | | 2018 | 9,309 | | 2017 | 8,724 | | 2016 | 8,075 | | 2015 | 7,347 | | 2014 | 6,554 | | 2013 | 5,800 | | 2012 | 5,148 | | 2011 | 4,593 | | 2010 | 4,153 | | 2009 | 3,827 | | 2008 | 3,601 | | 2007 | 3,435 | | 2006 | 3,299 | | 2005 | 3,186 | | 2004 | 3,110 | | 2003 | 3,085 | | 2002 | 3,112 | | 2001 | 3,190 | | 2000 | 3,298 | | 1999 | 3,391 | | 1998 | 3,439 | | 1997 | 3,450 | | 1996 | 3,435 | | 1995 | 3,411 | | 1994 | 3,396 | | 1993 | 3,378 | | 1992 | 3,348 | | 1991 | 3,314 | | 1990 | 3,281 | | 1989 | 3,226 | | 1988 | 3,136 | | 1987 | 3,031 | | 1986 | 2,924 | | 1985 | 2,827 | | 1984 | 2,737 | | 1983 | 2,645 | | 1982 | 2,548 | | 1981 | 2,452 | | 1980 | 2,359 | | 1979 | 2,268 | | 1978 | 2,187 | | 1977 | 2,107 | | 1976 | 2,024 | | 1975 | 1,946 | | 1974 | 1,874 | | 1973 | 1,811 | | 1972 | 1,755 | | 1971 | 1,700 | | 1970 | 1,648 | | 1969 | 1,601 | | 1968 | 1,554 | | 1967 | 1,528 | | 1966 | 1,546 | | 1965 | 1,583 | | 1964 | 1,571 | | 1963 | 1,511 | | 1962 | 1,449 | | 1961 | 1,394 | | 1960 | 1,348 |
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