| Year | Value | | 2022 | 2,770 | | 2021 | 2,624 | | 2020 | 2,473 | | 2019 | 2,316 | | 2018 | 2,160 | | 2017 | 2,011 | | 2016 | 1,869 | | 2015 | 1,744 | | 2014 | 1,641 | | 2013 | 1,554 | | 2012 | 1,476 | | 2011 | 1,404 | | 2010 | 1,332 | | 2009 | 1,264 | | 2008 | 1,202 | | 2007 | 1,145 | | 2006 | 1,095 | | 2005 | 1,054 | | 2004 | 1,023 | | 2003 | 1,001 | | 2002 | 986 | | 2001 | 971 | | 2000 | 952 | | 1999 | 925 | | 1998 | 894 | | 1997 | 856 | | 1996 | 822 | | 1995 | 787 | | 1994 | 755 | | 1993 | 730 | | 1992 | 703 | | 1991 | 672 | | 1990 | 644 | | 1989 | 601 | | 1988 | 567 | | 1987 | 538 | | 1986 | 515 | | 1985 | 493 | | 1984 | 469 | | 1983 | 456 | | 1982 | 452 | | 1981 | 443 | | 1980 | 431 | | 1979 | 405 | | 1978 | 392 | | 1977 | 371 | | 1976 | 376 | | 1975 | 366 | | 1974 | 350 | | 1973 | 327 | | 1972 | 296 | | 1971 | 275 | | 1970 | 253 | | 1969 | 251 | | 1968 | 235 | | 1967 | 208 | | 1966 | 196 | | 1965 | 183 | | 1964 | 174 | | 1963 | 180 | | 1962 | 169 | | 1961 | 176 | | 1960 | 215 |
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