| Year | Value | | 2022 | 4,925 | | 2021 | 5,085 | | 2020 | 5,220 | | 2019 | 5,331 | | 2018 | 5,411 | | 2017 | 5,457 | | 2016 | 5,477 | | 2015 | 5,480 | | 2014 | 5,484 | | 2013 | 5,493 | | 2012 | 5,493 | | 2011 | 5,477 | | 2010 | 5,439 | | 2009 | 5,386 | | 2008 | 5,319 | | 2007 | 5,224 | | 2006 | 5,116 | | 2005 | 5,010 | | 2004 | 4,911 | | 2003 | 4,821 | | 2002 | 4,739 | | 2001 | 4,669 | | 2000 | 4,605 | | 1999 | 4,532 | | 1998 | 4,438 | | 1997 | 4,319 | | 1996 | 4,151 | | 1995 | 3,904 | | 1994 | 3,603 | | 1993 | 3,292 | | 1992 | 2,994 | | 1991 | 2,746 | | 1990 | 2,598 | | 1989 | 2,546 | | 1988 | 2,533 | | 1987 | 2,536 | | 1986 | 2,520 | | 1985 | 2,450 | | 1984 | 2,352 | | 1983 | 2,273 | | 1982 | 2,212 | | 1981 | 2,145 | | 1980 | 2,090 | | 1979 | 2,058 | | 1978 | 2,010 | | 1977 | 1,948 | | 1976 | 1,897 | | 1975 | 1,848 | | 1974 | 1,778 | | 1973 | 1,689 | | 1972 | 1,589 | | 1971 | 1,485 | | 1970 | 1,397 | | 1969 | 1,339 | | 1968 | 1,305 | | 1967 | 1,272 | | 1966 | 1,238 | | 1965 | 1,205 | | 1964 | 1,168 | | 1963 | 1,130 | | 1962 | 1,093 | | 1961 | 1,060 | | 1960 | 1,026 |
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