Year	US Dollars
1990	61644406414.5086
1991	68142263029.91238
1992	68467749703.9341
1993	69177088306.59641
1994	78495177721.77409
1995	75560135390.59457
1996	87102587047.1915
1997	87156548980.188
1998	95045781221.4789
1999	97626443831.80188
2000	101610791482.52899
2001	111656541461.04099
2002	117284550331.14697
2003	127028853325.73901
2004	137296134997.09299
2005	147146291895.34302
2006	162970744375.35596
2007	173555402931.01196
2008	187714905191.28497
2009	194860438290.10693
2010	204771170622.52402
2011	219272498095.561
2012	229255827161.436
2013	245153299571.05499
2014	254133090969.07401
2015	270858751227.16501
2016	276292057634.60004
2017	292611525457.74701