| Year | Value | | 2022 | 2,763 | | 2021 | 2,601 | | 2020 | 2,435 | | 2019 | 2,268 | | 2018 | 2,123 | | 2017 | 2,003 | | 2016 | 1,911 | | 2015 | 1,848 | | 2014 | 1,803 | | 2013 | 1,761 | | 2012 | 1,723 | | 2011 | 1,687 | | 2010 | 1,647 | | 2009 | 1,610 | | 2008 | 1,578 | | 2007 | 1,551 | | 2006 | 1,529 | | 2005 | 1,504 | | 2004 | 1,478 | | 2003 | 1,453 | | 2002 | 1,416 | | 2001 | 1,362 | | 2000 | 1,312 | | 1999 | 1,261 | | 1998 | 1,205 | | 1997 | 1,155 | | 1996 | 1,106 | | 1995 | 1,053 | | 1994 | 1,011 | | 1993 | 994 | | 1992 | 999 | | 1991 | 1,002 | | 1990 | 986 | | 1989 | 968 | | 1988 | 958 | | 1987 | 954 | | 1986 | 958 | | 1985 | 968 | | 1984 | 977 | | 1983 | 978 | | 1982 | 958 | | 1981 | 923 | | 1980 | 889 | | 1979 | 857 | | 1978 | 828 | | 1977 | 807 | | 1976 | 797 | | 1975 | 796 | | 1974 | 801 | | 1973 | 807 | | 1972 | 806 | | 1971 | 797 | | 1970 | 778 | | 1969 | 752 | | 1968 | 721 | | 1967 | 691 | | 1966 | 664 | | 1965 | 641 | | 1964 | 622 | | 1963 | 603 | | 1962 | 586 | | 1961 | 574 | | 1960 | 560 |
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