Year | Value | 2022 | 6,504 | 2021 | 6,410 | 2020 | 6,351 | 2019 | 6,332 | 2018 | 6,339 | 2017 | 6,355 | 2016 | 6,371 | 2015 | 6,382 | 2014 | 6,392 | 2013 | 6,395 | 2012 | 6,382 | 2011 | 6,360 | 2010 | 6,325 | 2009 | 6,239 | 2008 | 6,113 | 2007 | 5,992 | 2006 | 5,857 | 2005 | 5,684 | 2004 | 5,481 | 2003 | 5,261 | 2002 | 5,024 | 2001 | 4,772 | 2000 | 4,525 | 1999 | 4,276 | 1998 | 4,026 | 1997 | 3,814 | 1996 | 3,642 | 1995 | 3,485 | 1994 | 3,340 | 1993 | 3,209 | 1992 | 3,079 | 1991 | 2,965 | 1990 | 2,875 | 1989 | 2,793 | 1988 | 2,718 | 1987 | 2,646 | 1986 | 2,574 | 1985 | 2,503 | 1984 | 2,431 | 1983 | 2,353 | 1982 | 2,278 | 1981 | 2,212 | 1980 | 2,156 | 1979 | 2,115 | 1978 | 2,090 | 1977 | 2,076 | 1976 | 2,069 | 1975 | 2,075 | 1974 | 2,089 | 1973 | 2,102 | 1972 | 2,121 | 1971 | 2,144 | 1970 | 2,166 | 1969 | 2,187 | 1968 | 2,207 | 1967 | 2,219 | 1966 | 2,229 | 1965 | 2,231 | 1964 | 2,227 | 1963 | 2,217 | 1962 | 2,200 | 1961 | 2,180 | 1960 | 2,158 |
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