| Year | Value | | 2022 | 9,192 | | 2021 | 9,099 | | 2020 | 8,953 | | 2019 | 8,744 | | 2018 | 8,520 | | 2017 | 8,322 | | 2016 | 8,138 | | 2015 | 7,961 | | 2014 | 7,764 | | 2013 | 7,448 | | 2012 | 7,114 | | 2011 | 6,793 | | 2010 | 6,503 | | 2009 | 6,233 | | 2008 | 5,951 | | 2007 | 5,666 | | 2006 | 5,413 | | 2005 | 5,223 | | 2004 | 5,090 | | 2003 | 4,973 | | 2002 | 4,856 | | 2001 | 4,728 | | 2000 | 4,590 | | 1999 | 4,447 | | 1998 | 4,305 | | 1997 | 4,173 | | 1996 | 4,062 | | 1995 | 3,975 | | 1994 | 3,874 | | 1993 | 3,750 | | 1992 | 3,621 | | 1991 | 3,486 | | 1990 | 3,341 | | 1989 | 3,210 | | 1988 | 3,093 | | 1987 | 2,974 | | 1986 | 2,857 | | 1985 | 2,744 | | 1984 | 2,634 | | 1983 | 2,530 | | 1982 | 2,438 | | 1981 | 2,353 | | 1980 | 2,278 | | 1979 | 2,219 | | 1978 | 2,166 | | 1977 | 2,103 | | 1976 | 2,027 | | 1975 | 1,971 | | 1974 | 1,937 | | 1973 | 1,904 | | 1972 | 1,881 | | 1971 | 1,836 | | 1970 | 1,765 | | 1969 | 1,691 | | 1968 | 1,656 | | 1967 | 1,629 | | 1966 | 1,597 | | 1965 | 1,564 | | 1964 | 1,538 | | 1963 | 1,506 | | 1962 | 1,475 | | 1961 | 1,445 | | 1960 | 1,413 |
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