| Year | Value | | 2022 | 1,946 | | 2021 | 1,857 | | 2020 | 1,791 | | 2019 | 1,786 | | 2018 | 1,784 | | 2017 | 1,764 | | 2016 | 1,740 | | 2015 | 1,708 | | 2014 | 1,670 | | 2013 | 1,651 | | 2012 | 1,659 | | 2011 | 1,661 | | 2010 | 1,633 | | 2009 | 1,601 | | 2008 | 1,577 | | 2007 | 1,564 | | 2006 | 1,557 | | 2005 | 1,562 | | 2004 | 1,570 | | 2003 | 1,562 | | 2002 | 1,544 | | 2001 | 1,533 | | 2000 | 1,528 | | 1999 | 1,530 | | 1998 | 1,542 | | 1997 | 1,544 | | 1996 | 1,528 | | 1995 | 1,506 | | 1994 | 1,486 | | 1993 | 1,469 | | 1992 | 1,459 | | 1991 | 1,463 | | 1990 | 1,469 | | 1989 | 1,466 | | 1988 | 1,455 | | 1987 | 1,435 | | 1986 | 1,403 | | 1985 | 1,367 | | 1984 | 1,327 | | 1983 | 1,288 | | 1982 | 1,255 | | 1981 | 1,227 | | 1980 | 1,197 | | 1979 | 1,169 | | 1978 | 1,139 | | 1977 | 1,106 | | 1976 | 1,070 | | 1975 | 1,029 | | 1974 | 984 | | 1973 | 941 | | 1972 | 905 | | 1971 | 870 | | 1970 | 840 | | 1969 | 816 | | 1968 | 796 | | 1967 | 779 | | 1966 | 763 | | 1965 | 748 | | 1964 | 734 | | 1963 | 724 | | 1962 | 714 | | 1961 | 705 | | 1960 | 695 |
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