Year	current US$
1990	35336111570.0647
1991	28024034267.5837
1992	34482577416.153
1993	35682235461.8256
1994	49584119173.9693
1995	57461085682.7145
1996	63026167587.3556
1997	67678177325.857
1998	66569173393.6634
1999	72010780704.6414
2000	71139052727.7336
2001	73208965186.8161
2002	85331395237.9716
2003	117109181067.173
2004	151901986154.737
2005	182592140438.285
2006	226820868377.236
2007	301592557974.638
2008	268825138206.802
2009	313763522457.234
2010	403703404603.738
2011	406217805838.446
2012	410668468565.27
2013	398750078152.841
2014	424268585260.411
2015	431710753172.928
2016	441538703742.211
2017	538084038997.17
2018	524593596800.086
2019	502149221209.357
2020	413095881075.668
2021	518597451921.391