| Year | Value | | 2022 | 2,304 | | 2021 | 2,200 | | 2020 | 2,080 | | 2019 | 1,957 | | 2018 | 1,839 | | 2017 | 1,725 | | 2016 | 1,611 | | 2015 | 1,509 | | 2014 | 1,430 | | 2013 | 1,374 | | 2012 | 1,339 | | 2011 | 1,321 | | 2010 | 1,304 | | 2009 | 1,276 | | 2008 | 1,237 | | 2007 | 1,190 | | 2006 | 1,139 | | 2005 | 1,099 | | 2004 | 1,067 | | 2003 | 1,039 | | 2002 | 1,022 | | 2001 | 1,022 | | 2000 | 1,019 | | 1999 | 1,001 | | 1998 | 976 | | 1997 | 937 | | 1996 | 889 | | 1995 | 849 | | 1994 | 823 | | 1993 | 812 | | 1992 | 825 | | 1991 | 853 | | 1990 | 878 | | 1989 | 891 | | 1988 | 888 | | 1987 | 869 | | 1986 | 836 | | 1985 | 797 | | 1984 | 762 | | 1983 | 739 | | 1982 | 725 | | 1981 | 717 | | 1980 | 714 | | 1979 | 713 | | 1978 | 726 | | 1977 | 750 | | 1976 | 757 | | 1975 | 746 | | 1974 | 729 | | 1973 | 717 | | 1972 | 717 | | 1971 | 718 | | 1970 | 708 | | 1969 | 686 | | 1968 | 672 | | 1967 | 673 | | 1966 | 677 | | 1965 | 675 | | 1964 | 668 | | 1963 | 662 | | 1962 | 659 | | 1961 | 657 | | 1960 | 656 |
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