| Year | Value | | 2022 | 9,885 | | 2021 | 9,676 | | 2020 | 9,416 | | 2019 | 9,093 | | 2018 | 8,765 | | 2017 | 8,445 | | 2016 | 8,114 | | 2015 | 7,782 | | 2014 | 7,449 | | 2013 | 7,102 | | 2012 | 6,756 | | 2011 | 6,441 | | 2010 | 6,157 | | 2009 | 5,908 | | 2008 | 5,709 | | 2007 | 5,582 | | 2006 | 5,489 | | 2005 | 5,382 | | 2004 | 5,265 | | 2003 | 5,127 | | 2002 | 4,976 | | 2001 | 4,803 | | 2000 | 4,608 | | 1999 | 4,411 | | 1998 | 4,219 | | 1997 | 4,049 | | 1996 | 3,907 | | 1995 | 3,782 | | 1994 | 3,660 | | 1993 | 3,530 | | 1992 | 3,386 | | 1991 | 3,227 | | 1990 | 3,059 | | 1989 | 2,891 | | 1988 | 2,738 | | 1987 | 2,609 | | 1986 | 2,501 | | 1985 | 2,412 | | 1984 | 2,337 | | 1983 | 2,236 | | 1982 | 2,112 | | 1981 | 1,986 | | 1980 | 1,854 | | 1979 | 1,727 | | 1978 | 1,622 | | 1977 | 1,546 | | 1976 | 1,507 | | 1975 | 1,505 | | 1974 | 1,523 | | 1973 | 1,548 | | 1972 | 1,560 | | 1971 | 1,560 | | 1970 | 1,545 | | 1969 | 1,509 | | 1968 | 1,459 | | 1967 | 1,408 | | 1966 | 1,365 | | 1965 | 1,330 | | 1964 | 1,303 | | 1963 | 1,274 | | 1962 | 1,239 | | 1961 | 1,198 | | 1960 | 1,147 |
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