Year | Value | 2022 | 942 | 2021 | 934 | 2020 | 931 | 2019 | 936 | 2018 | 946 | 2017 | 959 | 2016 | 975 | 2015 | 984 | 2014 | 985 | 2013 | 985 | 2012 | 983 | 2011 | 978 | 2010 | 974 | 2009 | 968 | 2008 | 957 | 2007 | 949 | 2006 | 944 | 2005 | 941 | 2004 | 940 | 2003 | 940 | 2002 | 936 | 2001 | 922 | 2000 | 904 | 1999 | 885 | 1998 | 867 | 1997 | 850 | 1996 | 841 | 1995 | 836 | 1994 | 833 | 1993 | 827 | 1992 | 818 | 1991 | 807 | 1990 | 801 | 1989 | 800 | 1988 | 799 | 1987 | 800 | 1986 | 800 | 1985 | 796 | 1984 | 792 | 1983 | 789 | 1982 | 786 | 1981 | 780 | 1980 | 770 | 1979 | 757 | 1978 | 744 | 1977 | 725 | 1976 | 705 | 1975 | 681 | 1974 | 651 | 1973 | 614 | 1972 | 576 | 1971 | 538 | 1970 | 504 | 1969 | 479 | 1968 | 464 | 1967 | 458 | 1966 | 456 | 1965 | 455 | 1964 | 456 | 1963 | 457 | 1962 | 460 | 1961 | 463 | 1960 | 468 |
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