| Year | Value | | 2022 | 7,414 | | 2021 | 7,263 | | 2020 | 7,088 | | 2019 | 6,869 | | 2018 | 6,607 | | 2017 | 6,319 | | 2016 | 6,024 | | 2015 | 5,737 | | 2014 | 5,464 | | 2013 | 5,202 | | 2012 | 4,960 | | 2011 | 4,743 | | 2010 | 4,538 | | 2009 | 4,313 | | 2008 | 4,070 | | 2007 | 3,822 | | 2006 | 3,565 | | 2005 | 3,309 | | 2004 | 3,058 | | 2003 | 2,827 | | 2002 | 2,638 | | 2001 | 2,507 | | 2000 | 2,427 | | 1999 | 2,373 | | 1998 | 2,328 | | 1997 | 2,269 | | 1996 | 2,194 | | 1995 | 2,123 | | 1994 | 2,072 | | 1993 | 2,046 | | 1992 | 2,043 | | 1991 | 2,049 | | 1990 | 2,049 | | 1989 | 2,043 | | 1988 | 2,032 | | 1987 | 2,018 | | 1986 | 1,997 | | 1985 | 1,966 | | 1984 | 1,925 | | 1983 | 1,865 | | 1982 | 1,793 | | 1981 | 1,730 | | 1980 | 1,677 | | 1979 | 1,635 | | 1978 | 1,603 | | 1977 | 1,574 | | 1976 | 1,546 | | 1975 | 1,522 | | 1974 | 1,506 | | 1973 | 1,504 | | 1972 | 1,515 | | 1971 | 1,533 | | 1970 | 1,544 | | 1969 | 1,542 | | 1968 | 1,535 | | 1967 | 1,517 | | 1966 | 1,490 | | 1965 | 1,461 | | 1964 | 1,432 | | 1963 | 1,402 | | 1962 | 1,373 | | 1961 | 1,343 | | 1960 | 1,307 |
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