| Year | Value | | 2022 | 3,277 | | 2021 | 3,295 | | 2020 | 3,343 | | 2019 | 3,335 | | 2018 | 3,475 | | 2017 | 3,672 | | 2016 | 3,634 | | 2015 | 3,551 | | 2014 | 3,441 | | 2013 | 3,319 | | 2012 | 3,196 | | 2011 | 3,066 | | 2010 | 2,899 | | 2009 | 2,742 | | 2008 | 2,624 | | 2007 | 2,515 | | 2006 | 2,415 | | 2005 | 2,320 | | 2004 | 2,245 | | 2003 | 2,199 | | 2002 | 2,139 | | 2001 | 2,104 | | 2000 | 2,123 | | 1999 | 2,125 | | 1998 | 2,106 | | 1997 | 2,052 | | 1996 | 1,958 | | 1995 | 1,861 | | 1994 | 1,783 | | 1993 | 1,716 | | 1992 | 1,659 | | 1991 | 1,626 | | 1990 | 1,605 | | 1989 | 1,590 | | 1988 | 1,582 | | 1987 | 1,562 | | 1986 | 1,522 | | 1985 | 1,468 | | 1984 | 1,410 | | 1983 | 1,366 | | 1982 | 1,344 | | 1981 | 1,348 | | 1980 | 1,385 | | 1979 | 1,439 | | 1978 | 1,500 | | 1977 | 1,557 | | 1976 | 1,580 | | 1975 | 1,576 | | 1974 | 1,545 | | 1973 | 1,491 | | 1972 | 1,450 | | 1971 | 1,401 | | 1970 | 1,331 | | 1969 | 1,257 | | 1968 | 1,181 | | 1967 | 1,111 | | 1966 | 1,054 | | 1965 | 1,009 | | 1964 | 966 | | 1963 | 925 | | 1962 | 884 | | 1961 | 848 | | 1960 | 822 |
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