| Year | Value | | 2022 | 8,251 | | 2021 | 8,101 | | 2020 | 8,044 | | 2019 | 7,859 | | 2018 | 7,558 | | 2017 | 7,285 | | 2016 | 7,055 | | 2015 | 6,882 | | 2014 | 6,763 | | 2013 | 6,643 | | 2012 | 6,468 | | 2011 | 6,241 | | 2010 | 5,993 | | 2009 | 5,737 | | 2008 | 5,464 | | 2007 | 5,178 | | 2006 | 4,895 | | 2005 | 4,628 | | 2004 | 4,384 | | 2003 | 4,176 | | 2002 | 4,005 | | 2001 | 3,849 | | 2000 | 3,700 | | 1999 | 3,562 | | 1998 | 3,437 | | 1997 | 3,334 | | 1996 | 3,267 | | 1995 | 3,249 | | 1994 | 3,259 | | 1993 | 3,268 | | 1992 | 3,273 | | 1991 | 3,285 | | 1990 | 3,281 | | 1989 | 3,243 | | 1988 | 3,186 | | 1987 | 3,108 | | 1986 | 2,988 | | 1985 | 2,837 | | 1984 | 2,687 | | 1983 | 2,549 | | 1982 | 2,428 | | 1981 | 2,320 | | 1980 | 2,219 | | 1979 | 2,130 | | 1978 | 2,055 | | 1977 | 1,992 | | 1976 | 1,935 | | 1975 | 1,886 | | 1974 | 1,835 | | 1973 | 1,778 | | 1972 | 1,721 | | 1971 | 1,665 | | 1970 | 1,606 | | 1969 | 1,540 | | 1968 | 1,473 | | 1967 | 1,410 | | 1966 | 1,339 | | 1965 | 1,265 | | 1964 | 1,204 | | 1963 | 1,156 | | 1962 | 1,118 | | 1961 | 1,092 | | 1960 | 1,083 |
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