| Year | Value | | 2022 | 9,485 | | 2021 | 9,102 | | 2020 | 8,714 | | 2019 | 8,344 | | 2018 | 8,014 | | 2017 | 7,736 | | 2016 | 7,489 | | 2015 | 7,255 | | 2014 | 7,010 | | 2013 | 6,738 | | 2012 | 6,437 | | 2011 | 6,112 | | 2010 | 5,773 | | 2009 | 5,413 | | 2008 | 5,050 | | 2007 | 4,719 | | 2006 | 4,430 | | 2005 | 4,171 | | 2004 | 3,932 | | 2003 | 3,706 | | 2002 | 3,477 | | 2001 | 3,227 | | 2000 | 2,971 | | 1999 | 2,725 | | 1998 | 2,498 | | 1997 | 2,317 | | 1996 | 2,214 | | 1995 | 2,178 | | 1994 | 2,178 | | 1993 | 2,189 | | 1992 | 2,184 | | 1991 | 2,165 | | 1990 | 2,135 | | 1989 | 2,095 | | 1988 | 2,057 | | 1987 | 2,039 | | 1986 | 2,039 | | 1985 | 2,046 | | 1984 | 2,053 | | 1983 | 2,056 | | 1982 | 2,034 | | 1981 | 1,983 | | 1980 | 1,918 | | 1979 | 1,853 | | 1978 | 1,793 | | 1977 | 1,743 | | 1976 | 1,706 | | 1975 | 1,684 | | 1974 | 1,681 | | 1973 | 1,688 | | 1972 | 1,696 | | 1971 | 1,707 | | 1970 | 1,715 | | 1969 | 1,719 | | 1968 | 1,727 | | 1967 | 1,740 | | 1966 | 1,752 | | 1965 | 1,754 | | 1964 | 1,747 | | 1963 | 1,725 | | 1962 | 1,692 | | 1961 | 1,656 | | 1960 | 1,617 |
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