| Year | Value | | 2022 | 1,788 | | 2021 | 1,743 | | 2020 | 1,695 | | 2019 | 1,644 | | 2018 | 1,590 | | 2017 | 1,542 | | 2016 | 1,498 | | 2015 | 1,454 | | 2014 | 1,415 | | 2013 | 1,381 | | 2012 | 1,348 | | 2011 | 1,321 | | 2010 | 1,293 | | 2009 | 1,262 | | 2008 | 1,228 | | 2007 | 1,189 | | 2006 | 1,149 | | 2005 | 1,111 | | 2004 | 1,075 | | 2003 | 1,035 | | 2002 | 991 | | 2001 | 944 | | 2000 | 896 | | 1999 | 846 | | 1998 | 796 | | 1997 | 753 | | 1996 | 713 | | 1995 | 673 | | 1994 | 637 | | 1993 | 606 | | 1992 | 578 | | 1991 | 552 | | 1990 | 527 | | 1989 | 503 | | 1988 | 480 | | 1987 | 463 | | 1986 | 452 | | 1985 | 442 | | 1984 | 432 | | 1983 | 422 | | 1982 | 411 | | 1981 | 403 | | 1980 | 400 | | 1979 | 398 | | 1978 | 398 | | 1977 | 396 | | 1976 | 397 | | 1975 | 397 | | 1974 | 391 | | 1973 | 382 | | 1972 | 375 | | 1971 | 368 | | 1970 | 348 | | 1969 | 324 | | 1968 | 310 | | 1967 | 301 | | 1966 | 287 | | 1965 | 272 | | 1964 | 260 | | 1963 | 249 | | 1962 | 236 | | 1961 | 219 | | 1960 | 202 |
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