Year | Value | 2021 | 1,796.8066926433 | 2020 | 1,651.2673403453 | 2019 | 1,684.5660606932 | 2018 | 1,555.7155860299 | 2017 | 1,396.3168606383 | 2016 | 1,311.5650138877 | 2015 | 1,126.0099261264 | 2014 | 1,102.0331311344 | 2013 | 1,023.4653820559 | 2012 | 970.68596746828 | 2011 | 830.42108174245 | 2010 | 809.34613700838 | 2009 | 766.38056253091 | 2008 | 763.96592105815 | 2007 | 695.1357331961 | 2006 | 581.3851459904 | 2005 | 425.62534723242 | 2004 | 368.91697718322 | 2003 | 345.83417385053 | 2002 | 321.20399405656 | 2001 | 329.66688542668 | 2000 | 331.2147555388 | 1999 | 344.84922463292 | 1998 | 386.05607828361 | 1997 | 366.42546048942 | 1996 | 339.66103088368 | 1995 | 252.78283846098 | 1994 | 207.3082034118 | 1993 | 167.82555246725 | 1992 | 258.34997651307 | 1991 | 266.46556983735 | 1990 | 292.7951048154 | 1989 | 300.71903427185 | 1988 | 312.97210084338 | 1987 | 310.90941123319 | 1986 | 292.60944817693 | 1985 | 258.41193227978 | 1984 | 267.989896077 | 1983 | 265.35711151026 | 1982 | 284.91544245086 | 1981 | 324.66238149276 | 1980 | 356.71498985397 | 1979 | 315.07823077714 | 1978 | 277.32304222134 | 1977 | 241.29035376358 | 1976 | 193.03422840089 | 1975 | 189.24494748303 | 1974 | 179.90862519525 | 1973 | 155.58668241525 | 1972 | 141.87582677208 | 1971 | 124.04449172544 |
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