| Year | Value | | 2022 | 10,829 | | 2021 | 10,610 | | 2020 | 10,404 | | 2019 | 10,124 | | 2018 | 9,867 | | 2017 | 9,578 | | 2016 | 9,199 | | 2015 | 8,941 | | 2014 | 8,781 | | 2013 | 8,546 | | 2012 | 8,310 | | 2011 | 8,130 | | 2010 | 7,875 | | 2009 | 7,558 | | 2008 | 7,252 | | 2007 | 6,902 | | 2006 | 6,482 | | 2005 | 5,997 | | 2004 | 5,565 | | 2003 | 5,256 | | 2002 | 5,006 | | 2001 | 4,837 | | 2000 | 4,771 | | 1999 | 4,751 | | 1998 | 4,739 | | 1997 | 4,766 | | 1996 | 4,868 | | 1995 | 5,019 | | 1994 | 5,120 | | 1993 | 5,168 | | 1992 | 5,191 | | 1991 | 5,126 | | 1990 | 5,003 | | 1989 | 4,889 | | 1988 | 4,804 | | 1987 | 4,704 | | 1986 | 4,641 | | 1985 | 4,616 | | 1984 | 4,531 | | 1983 | 4,421 | | 1982 | 4,327 | | 1981 | 4,208 | | 1980 | 4,057 | | 1979 | 3,961 | | 1978 | 3,918 | | 1977 | 3,859 | | 1976 | 3,801 | | 1975 | 3,748 | | 1974 | 3,718 | | 1973 | 3,680 | | 1972 | 3,597 | | 1971 | 3,550 | | 1970 | 3,539 | | 1969 | 3,516 | | 1968 | 3,505 | | 1967 | 3,502 | | 1966 | 3,422 | | 1965 | 3,323 | | 1964 | 3,226 | | 1963 | 3,117 | | 1962 | 3,068 | | 1961 | 3,052 | | 1960 | 3,034 |
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