| Year | Value | | 2022 | 1,108 | | 2021 | 1,091 | | 2020 | 1,073 | | 2019 | 1,043 | | 2018 | 1,010 | | 2017 | 1,005 | | 2016 | 1,028 | | 2015 | 1,060 | | 2014 | 1,070 | | 2013 | 1,058 | | 2012 | 1,050 | | 2011 | 1,037 | | 2010 | 1,018 | | 2009 | 1,032 | | 2008 | 1,068 | | 2007 | 1,096 | | 2006 | 1,105 | | 2005 | 1,097 | | 2004 | 1,081 | | 2003 | 1,060 | | 2002 | 1,044 | | 2001 | 1,042 | | 2000 | 1,048 | | 1999 | 1,051 | | 1998 | 1,048 | | 1997 | 1,041 | | 1996 | 1,020 | | 1995 | 986 | | 1994 | 953 | | 1993 | 922 | | 1992 | 899 | | 1991 | 896 | | 1990 | 902 | | 1989 | 908 | | 1988 | 901 | | 1987 | 872 | | 1986 | 829 | | 1985 | 790 | | 1984 | 759 | | 1983 | 735 | | 1982 | 715 | | 1981 | 701 | | 1980 | 691 | | 1979 | 679 | | 1978 | 669 | | 1977 | 658 | | 1976 | 638 | | 1975 | 610 | | 1974 | 587 | | 1973 | 571 | | 1972 | 561 | | 1971 | 552 | | 1970 | 542 | | 1969 | 531 | | 1968 | 521 | | 1967 | 510 | | 1966 | 496 | | 1965 | 479 | | 1964 | 461 | | 1963 | 444 | | 1962 | 424 | | 1961 | 406 | | 1960 | 388 |
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