Year | Value | 2022 | 620 | 2021 | 634 | 2020 | 660 | 2019 | 679 | 2018 | 684 | 2017 | 685 | 2016 | 680 | 2015 | 671 | 2014 | 662 | 2013 | 655 | 2012 | 650 | 2011 | 647 | 2010 | 636 | 2009 | 619 | 2008 | 600 | 2007 | 582 | 2006 | 568 | 2005 | 559 | 2004 | 551 | 2003 | 546 | 2002 | 545 | 2001 | 546 | 2000 | 545 | 1999 | 540 | 1998 | 529 | 1997 | 516 | 1996 | 498 | 1995 | 479 | 1994 | 459 | 1993 | 439 | 1992 | 421 | 1991 | 406 | 1990 | 396 | 1989 | 389 | 1988 | 384 | 1987 | 381 | 1986 | 378 | 1985 | 375 | 1984 | 373 | 1983 | 370 | 1982 | 368 | 1981 | 359 | 1980 | 345 | 1979 | 337 | 1978 | 332 | 1977 | 328 | 1976 | 326 | 1975 | 324 | 1974 | 321 | 1973 | 318 | 1972 | 313 | 1971 | 307 | 1970 | 303 | 1969 | 293 | 1968 | 275 | 1967 | 257 | 1966 | 242 | 1965 | 228 | 1964 | 216 | 1963 | 205 | 1962 | 192 | 1961 | 181 | 1960 | 176 |
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