| Year | Value | | 2022 | 7,412 | | 2021 | 7,259 | | 2020 | 7,086 | | 2019 | 6,926 | | 2018 | 6,778 | | 2017 | 6,662 | | 2016 | 6,581 | | 2015 | 6,497 | | 2014 | 6,407 | | 2013 | 6,312 | | 2012 | 6,167 | | 2011 | 5,971 | | 2010 | 5,781 | | 2009 | 5,598 | | 2008 | 5,420 | | 2007 | 5,251 | | 2006 | 5,087 | | 2005 | 4,926 | | 2004 | 4,766 | | 2003 | 4,607 | | 2002 | 4,501 | | 2001 | 4,467 | | 2000 | 4,435 | | 1999 | 4,397 | | 1998 | 4,354 | | 1997 | 4,313 | | 1996 | 4,265 | | 1995 | 4,215 | | 1994 | 4,164 | | 1993 | 4,107 | | 1992 | 4,047 | | 1991 | 3,928 | | 1990 | 3,733 | | 1989 | 3,548 | | 1988 | 3,365 | | 1987 | 3,185 | | 1986 | 3,016 | | 1985 | 2,853 | | 1984 | 2,731 | | 1983 | 2,626 | | 1982 | 2,521 | | 1981 | 2,415 | | 1980 | 2,306 | | 1979 | 2,189 | | 1978 | 2,054 | | 1977 | 1,909 | | 1976 | 1,772 | | 1975 | 1,644 | | 1974 | 1,525 | | 1973 | 1,439 | | 1972 | 1,385 | | 1971 | 1,334 | | 1970 | 1,284 | | 1969 | 1,236 | | 1968 | 1,187 | | 1967 | 1,135 | | 1966 | 1,086 | | 1965 | 1,043 | | 1964 | 1,005 | | 1963 | 968 | | 1962 | 931 | | 1961 | 894 | | 1960 | 859 |
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