| Year | Value | | 2022 | 4,005 | | 2021 | 3,876 | | 2020 | 3,806 | | 2019 | 3,734 | | 2018 | 3,642 | | 2017 | 3,535 | | 2016 | 3,407 | | 2015 | 3,255 | | 2014 | 3,093 | | 2013 | 2,944 | | 2012 | 2,822 | | 2011 | 2,719 | | 2010 | 2,624 | | 2009 | 2,524 | | 2008 | 2,414 | | 2007 | 2,312 | | 2006 | 2,187 | | 2005 | 2,016 | | 2004 | 1,837 | | 2003 | 1,675 | | 2002 | 1,540 | | 2001 | 1,433 | | 2000 | 1,353 | | 1999 | 1,287 | | 1998 | 1,220 | | 1997 | 1,148 | | 1996 | 1,060 | | 1995 | 958 | | 1994 | 858 | | 1993 | 770 | | 1992 | 709 | | 1991 | 680 | | 1990 | 679 | | 1989 | 697 | | 1988 | 728 | | 1987 | 758 | | 1986 | 767 | | 1985 | 758 | | 1984 | 736 | | 1983 | 686 | | 1982 | 634 | | 1981 | 605 | | 1980 | 584 | | 1979 | 569 | | 1978 | 556 | | 1977 | 540 | | 1976 | 519 | | 1975 | 491 | | 1974 | 460 | | 1973 | 431 | | 1972 | 407 | | 1971 | 396 | | 1970 | 396 | | 1969 | 397 | | 1968 | 400 | | 1967 | 405 | | 1966 | 399 | | 1965 | 382 | | 1964 | 361 | | 1963 | 335 | | 1962 | 304 | | 1961 | 287 | | 1960 | 285 |
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