Year | Value | 2021 | 2,334.2705895526 | 2020 | 2,126.848100358 | 2019 | 2,079.9494812425 | 2018 | 2,098.2320680677 | 2017 | 1,918.4515870686 | 2016 | 1,846.7729627162 | 2015 | 1,835.5378214093 | 2014 | 2,020.6722473247 | 2013 | 1,260.8533747247 | 2012 | 1,109.5762714038 | 2011 | 1,047.2789087662 | 2010 | 1,070.9502322354 | 2009 | 1,059.6737818052 | 2008 | 1,058.7422843285 | 2007 | 904.21113694352 | 2006 | 794.26121525657 | 2005 | 791.377260442 | 2004 | 740.20240714449 | 2003 | 674.44146904351 | 2002 | 569.53401442064 | 2001 | 531.83291490196 | 2000 | 528.22736286063 | 1999 | 665.29122869738 | 1998 | 703.05198555065 | 1997 | 660.29719032261 | 1996 | 694.51797876448 | 1995 | 656.83599495992 | 1994 | 505.73277983508 | 1993 | 672.90071868526 | 1992 | 708.42167202963 | 1991 | 680.40561454897 | 1990 | 709.38211319766 | 1989 | 674.74267407223 | 1988 | 772.48368347435 | 1987 | 785.90289269082 | 1986 | 750.95527162737 | 1985 | 569.58291413603 | 1984 | 593.75407940431 | 1983 | 594.87809564507 | 1982 | 711.97634842768 | 1981 | 824.14148489776 | 1980 | 1,059.9416461277 | 1979 | 994.68926764256 | 1978 | 916.78582241815 | 1977 | 773.62358468905 | 1976 | 598.32812420106 | 1975 | 520.32656338594 | 1974 | 435.00634803848 | 1973 | 366.66550832938 | 1972 | 284.82842939558 | 1971 | 253.33954561523 |
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