Year | Value | 2024 | 471 | 2023 | 478 | 2022 | 486 | 2021 | 492 | 2020 | 498 | 2019 | 507 | 2018 | 517 | 2017 | 527 | 2016 | 537 | 2015 | 551 | 2014 | 565 | 2013 | 571 | 2012 | 575 | 2011 | 581 | 2010 | 590 | 2009 | 605 | 2008 | 623 | 2007 | 642 | 2006 | 661 | 2005 | 673 | 2004 | 662 | 2003 | 639 | 2002 | 623 | 2001 | 618 | 2000 | 634 | 1999 | 694 | 1998 | 771 | 1997 | 821 | 1996 | 846 | 1995 | 840 | 1994 | 817 | 1993 | 794 | 1992 | 776 | 1991 | 762 | 1990 | 754 | 1989 | 751 | 1988 | 750 | 1987 | 749 | 1986 | 748 | 1985 | 733 | 1984 | 708 | 1983 | 690 | 1982 | 681 | 1981 | 681 | 1980 | 700 | 1979 | 735 | 1978 | 769 | 1977 | 798 | 1976 | 826 | 1975 | 857 |
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