Year | Value | 2022 | 1,943 | 2021 | 1,507 | 2020 | 1,409 | 2019 | 1,325 | 2018 | 1,252 | 2017 | 1,188 | 2016 | 1,126 | 2015 | 1,075 | 2014 | 1,026 | 2013 | 986 | 2012 | 943 | 2011 | 902 | 2010 | 888 | 2009 | 826 | 2008 | 787 | 2007 | 740 | 2006 | 716 | 2005 | 689 | 2004 | 680 | 2003 | 686 | 2002 | 707 | 2001 | 705 | 2000 | 726 | 1999 | 744 | 1998 | 747 | 1997 | 804 | 1996 | 863 | 1995 | 853 | 1994 | 849 | 1993 | 830 | 1992 | 808 | 1991 | 798 | 1990 | 782 | 1989 | 774 | 1988 | 763 | 1987 | 751 | 1986 | 707 | 1985 | 684 | 1984 | 660 | 1983 | 636 | 1982 | 617 | 1981 | 595 | 1980 | 573 | 1979 | 553 | 1978 | 539 | 1977 | 553 | 1976 | 568 | 1975 | 571 | 1974 | 573 | 1973 | 582 | 1972 | 587 | 1971 | 584 | 1970 | 575 | 1969 | 553 | 1968 | 527 | 1967 | 500 | 1966 | 476 | 1965 | 457 | 1964 | 442 | 1963 | 431 | 1962 | 423 | 1961 | 418 | 1960 | 419 |
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