| Year | Value | | 2022 | 6,590 | | 2021 | 6,165 | | 2020 | 5,735 | | 2019 | 5,305 | | 2018 | 4,890 | | 2017 | 4,490 | | 2016 | 4,093 | | 2015 | 3,707 | | 2014 | 3,339 | | 2013 | 3,014 | | 2012 | 2,775 | | 2011 | 2,634 | | 2010 | 2,590 | | 2009 | 2,601 | | 2008 | 2,598 | | 2007 | 2,549 | | 2006 | 2,462 | | 2005 | 2,359 | | 2004 | 2,265 | | 2003 | 2,192 | | 2002 | 2,133 | | 2001 | 2,077 | | 2000 | 2,013 | | 1999 | 1,925 | | 1998 | 1,808 | | 1997 | 1,677 | | 1996 | 1,547 | | 1995 | 1,438 | | 1994 | 1,360 | | 1993 | 1,306 | | 1992 | 1,263 | | 1991 | 1,221 | | 1990 | 1,177 | | 1989 | 1,130 | | 1988 | 1,086 | | 1987 | 1,048 | | 1986 | 1,009 | | 1985 | 969 | | 1984 | 942 | | 1983 | 937 | | 1982 | 951 | | 1981 | 963 | | 1980 | 966 | | 1979 | 964 | | 1978 | 958 | | 1977 | 953 | | 1976 | 943 | | 1975 | 917 | | 1974 | 876 | | 1973 | 826 | | 1972 | 775 | | 1971 | 730 | | 1970 | 697 | | 1969 | 683 | | 1968 | 684 | | 1967 | 690 | | 1966 | 700 | | 1965 | 714 | | 1964 | 722 | | 1963 | 719 | | 1962 | 701 | | 1961 | 665 | | 1960 | 611 |
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