| Year | Value | | 2022 | 3,458 | | 2021 | 3,248 | | 2020 | 3,189 | | 2019 | 3,194 | | 2018 | 3,253 | | 2017 | 3,359 | | 2016 | 3,425 | | 2015 | 3,426 | | 2014 | 3,101 | | 2013 | 2,523 | | 2012 | 2,220 | | 2011 | 2,184 | | 2010 | 2,160 | | 2009 | 2,140 | | 2008 | 2,152 | | 2007 | 2,168 | | 2006 | 2,161 | | 2005 | 2,114 | | 2004 | 1,993 | | 2003 | 1,832 | | 2002 | 1,717 | | 2001 | 1,644 | | 2000 | 1,577 | | 1999 | 1,517 | | 1998 | 1,451 | | 1997 | 1,376 | | 1996 | 1,295 | | 1995 | 1,210 | | 1994 | 1,123 | | 1993 | 1,042 | | 1992 | 972 | | 1991 | 922 | | 1990 | 899 | | 1989 | 886 | | 1988 | 867 | | 1987 | 846 | | 1986 | 826 | | 1985 | 804 | | 1984 | 778 | | 1983 | 747 | | 1982 | 712 | | 1981 | 681 | | 1980 | 671 | | 1979 | 676 | | 1978 | 677 | | 1977 | 666 | | 1976 | 651 | | 1975 | 635 | | 1974 | 621 | | 1973 | 611 | | 1972 | 601 | | 1971 | 586 | | 1970 | 545 | | 1969 | 483 | | 1968 | 422 | | 1967 | 368 | | 1966 | 324 | | 1965 | 290 | | 1964 | 281 | | 1963 | 287 | | 1962 | 291 | | 1961 | 294 | | 1960 | 295 |
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