| Year | Value | | 2022 | 4,933 | | 2021 | 5,141 | | 2020 | 5,313 | | 2019 | 5,362 | | 2018 | 5,351 | | 2017 | 5,321 | | 2016 | 5,270 | | 2015 | 5,200 | | 2014 | 5,113 | | 2013 | 5,019 | | 2012 | 4,931 | | 2011 | 4,852 | | 2010 | 4,780 | | 2009 | 4,711 | | 2008 | 4,645 | | 2007 | 4,575 | | 2006 | 4,502 | | 2005 | 4,427 | | 2004 | 4,343 | | 2003 | 4,248 | | 2002 | 4,143 | | 2001 | 4,025 | | 2000 | 3,885 | | 1999 | 3,726 | | 1998 | 3,558 | | 1997 | 3,387 | | 1996 | 3,215 | | 1995 | 3,048 | | 1994 | 2,885 | | 1993 | 2,731 | | 1992 | 2,587 | | 1991 | 2,451 | | 1990 | 2,328 | | 1989 | 2,217 | | 1988 | 2,117 | | 1987 | 2,030 | | 1986 | 1,954 | | 1985 | 1,882 | | 1984 | 1,815 | | 1983 | 1,748 | | 1982 | 1,682 | | 1981 | 1,618 | | 1980 | 1,560 | | 1979 | 1,507 | | 1978 | 1,456 | | 1977 | 1,406 | | 1976 | 1,362 | | 1975 | 1,320 | | 1974 | 1,283 | | 1973 | 1,256 | | 1972 | 1,240 | | 1971 | 1,240 | | 1970 | 1,251 | | 1969 | 1,265 | | 1968 | 1,282 | | 1967 | 1,299 | | 1966 | 1,315 | | 1965 | 1,327 | | 1964 | 1,337 | | 1963 | 1,347 | | 1962 | 1,356 | | 1961 | 1,367 | | 1960 | 1,382 |
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