| Year | Value | | 2022 | 3,537 | | 2021 | 3,216 | | 2020 | 2,913 | | 2019 | 2,645 | | 2018 | 2,434 | | 2017 | 2,283 | | 2016 | 2,188 | | 2015 | 2,130 | | 2014 | 2,083 | | 2013 | 2,025 | | 2012 | 1,946 | | 2011 | 1,850 | | 2010 | 1,768 | | 2009 | 1,715 | | 2008 | 1,669 | | 2007 | 1,627 | | 2006 | 1,591 | | 2005 | 1,564 | | 2004 | 1,538 | | 2003 | 1,502 | | 2002 | 1,454 | | 2001 | 1,396 | | 2000 | 1,329 | | 1999 | 1,263 | | 1998 | 1,208 | | 1997 | 1,163 | | 1996 | 1,125 | | 1995 | 1,093 | | 1994 | 1,065 | | 1993 | 1,033 | | 1992 | 992 | | 1991 | 948 | | 1990 | 910 | | 1989 | 878 | | 1988 | 857 | | 1987 | 854 | | 1986 | 857 | | 1985 | 860 | | 1984 | 856 | | 1983 | 844 | | 1982 | 834 | | 1981 | 832 | | 1980 | 823 | | 1979 | 802 | | 1978 | 775 | | 1977 | 743 | | 1976 | 710 | | 1975 | 679 | | 1974 | 647 | | 1973 | 610 | | 1972 | 566 | | 1971 | 524 | | 1970 | 492 | | 1969 | 472 | | 1968 | 455 | | 1967 | 442 | | 1966 | 425 | | 1965 | 405 | | 1964 | 382 | | 1963 | 356 | | 1962 | 333 | | 1961 | 315 | | 1960 | 308 |
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