| Year | Value | | 2022 | 2,102 | | 2021 | 2,087 | | 2020 | 2,048 | | 2019 | 1,974 | | 2018 | 1,899 | | 2017 | 1,853 | | 2016 | 1,835 | | 2015 | 1,833 | | 2014 | 1,832 | | 2013 | 1,810 | | 2012 | 1,749 | | 2011 | 1,650 | | 2010 | 1,528 | | 2009 | 1,408 | | 2008 | 1,323 | | 2007 | 1,293 | | 2006 | 1,298 | | 2005 | 1,306 | | 2004 | 1,300 | | 2003 | 1,282 | | 2002 | 1,260 | | 2001 | 1,239 | | 2000 | 1,218 | | 1999 | 1,195 | | 1998 | 1,172 | | 1997 | 1,151 | | 1996 | 1,125 | | 1995 | 1,100 | | 1994 | 1,078 | | 1993 | 1,054 | | 1992 | 1,027 | | 1991 | 999 | | 1990 | 966 | | 1989 | 931 | | 1988 | 894 | | 1987 | 852 | | 1986 | 808 | | 1985 | 767 | | 1984 | 720 | | 1983 | 671 | | 1982 | 627 | | 1981 | 587 | | 1980 | 549 | | 1979 | 515 | | 1978 | 487 | | 1977 | 464 | | 1976 | 444 | | 1975 | 426 | | 1974 | 413 | | 1973 | 402 | | 1972 | 392 | | 1971 | 381 | | 1970 | 371 | | 1969 | 364 | | 1968 | 358 | | 1967 | 351 | | 1966 | 345 | | 1965 | 341 | | 1964 | 336 | | 1963 | 332 | | 1962 | 327 | | 1961 | 323 | | 1960 | 319 |
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