Year | Value | 2022 | 975 | 2021 | 921 | 2020 | 870 | 2019 | 822 | 2018 | 788 | 2017 | 774 | 2016 | 769 | 2015 | 768 | 2014 | 763 | 2013 | 748 | 2012 | 725 | 2011 | 697 | 2010 | 660 | 2009 | 621 | 2008 | 591 | 2007 | 572 | 2006 | 565 | 2005 | 564 | 2004 | 564 | 2003 | 560 | 2002 | 553 | 2001 | 538 | 2000 | 522 | 1999 | 508 | 1998 | 490 | 1997 | 469 | 1996 | 451 | 1995 | 433 | 1994 | 417 | 1993 | 406 | 1992 | 405 | 1991 | 410 | 1990 | 417 | 1989 | 422 | 1988 | 422 | 1987 | 417 | 1986 | 406 | 1985 | 394 | 1984 | 383 | 1983 | 373 | 1982 | 365 | 1981 | 355 | 1980 | 347 | 1979 | 339 | 1978 | 342 | 1977 | 364 | 1976 | 403 | 1975 | 450 | 1974 | 492 | 1973 | 495 | 1972 | 455 | 1971 | 412 | 1970 | 384 | 1969 | 377 | 1968 | 372 | 1967 | 357 | 1966 | 343 | 1965 | 336 | 1964 | 340 | 1963 | 346 | 1962 | 352 | 1961 | 357 | 1960 | 365 |
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