Year | Value | 2021 | 4,185.8122625531 | 2020 | 3,668.8647256561 | 2019 | 3,871.590651287 | 2018 | 3,828.5564670164 | 2017 | 3,720.2823442428 | 2016 | 3,428.5583436896 | 2015 | 3,436.8745924581 | 2014 | 3,643.2361464856 | 2013 | 3,549.4093086157 | 2012 | 3,407.1647738199 | 2011 | 3,219.0627791506 | 2010 | 2,824.9584056602 | 2009 | 2,387.7073250035 | 2008 | 2,427.6155979824 | 2007 | 2,096.9473020501 | 2006 | 1,713.8680879673 | 2005 | 1,459.8896539229 | 2004 | 1,257.5143813198 | 2003 | 1,083.2580808638 | 2002 | 980.414563281 | 2001 | 967.77978150128 | 2000 | 972.8333299935 | 1999 | 914.5032898704 | 1998 | 951.05777879478 | 1997 | 993.00797579483 | 1996 | 949.95447367189 | 1995 | 868.48146059651 | 1994 | 780.02604972777 | 1993 | 711.07556835811 | 1992 | 667.27165131934 | 1991 | 626.35296192317 | 1990 | 612.82987819438 | 1989 | 540.94899845963 | 1988 | 517.42394688756 | 1987 | 486.62755484746 | 1986 | 489.60514768619 | 1985 | 475.8310112918 | 1984 | 468.4860520208 | 1983 | 470.5418666799 | 1982 | 498.48970526926 | 1981 | 515.83948431058 | 1980 | 453.76115927716 | 1979 | 397.50632497138 | 1978 | 354.10126830299 | 1977 | 334.37917265919 | 1976 | 305.91393539876 | 1975 | 293.40510757983 | 1974 | 272.18781779563 | 1973 | 226.97165895834 | 1972 | 183.9376027291 | 1971 | 168.18243618935 | 1970 | 159.26745700028 |
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