| Year | Value | | 2022 | 4,454 | | 2021 | 4,409 | | 2020 | 4,346 | | 2019 | 4,270 | | 2018 | 4,195 | | 2017 | 4,136 | | 2016 | 4,076 | | 2015 | 4,004 | | 2014 | 3,934 | | 2013 | 3,854 | | 2012 | 3,755 | | 2011 | 3,638 | | 2010 | 3,504 | | 2009 | 3,357 | | 2008 | 3,210 | | 2007 | 3,066 | | 2006 | 2,930 | | 2005 | 2,790 | | 2004 | 2,619 | | 2003 | 2,426 | | 2002 | 2,239 | | 2001 | 2,061 | | 2000 | 1,891 | | 1999 | 1,726 | | 1998 | 1,604 | | 1997 | 1,529 | | 1996 | 1,459 | | 1995 | 1,392 | | 1994 | 1,340 | | 1993 | 1,307 | | 1992 | 1,334 | | 1991 | 1,355 | | 1990 | 1,304 | | 1989 | 1,244 | | 1988 | 1,187 | | 1987 | 1,134 | | 1986 | 1,083 | | 1985 | 1,035 | | 1984 | 990 | | 1983 | 948 | | 1982 | 907 | | 1981 | 869 | | 1980 | 832 | | 1979 | 795 | | 1978 | 759 | | 1977 | 728 | | 1976 | 699 | | 1975 | 671 | | 1974 | 645 | | 1973 | 622 | | 1972 | 600 | | 1971 | 581 | | 1970 | 561 | | 1969 | 541 | | 1968 | 521 | | 1967 | 500 | | 1966 | 480 | | 1965 | 460 | | 1964 | 442 | | 1963 | 427 | | 1962 | 416 | | 1961 | 405 | | 1960 | 396 |
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