Year	current US$
1988	128210915.749207
1989	89062427.5270284
1990	85518156.5120564
1991	114189311.384714
1992	105649288.071973
1993	97973597.8860395
1994	104278711.813575
1995	122676391.470854
1996	153753200.748508
1997	180991483.545251
1998	291235634.557467
1999	314592667.758523
2000	344098482.05304
2001	358043245.238625
2002	411973554.806621
2003	475938925.231202
2004	559165704.330937
2005	608082077.398841
2006	681734808.957824
2007	780522914.208776
2008	1075467726.66341
2009	1073644655.20931
2010	1172586955.06708
2011	1268624006.42228
2012	1457552761.51084
2013	1677559732.32859
2014	1832925172.50309
2015	1733644645.47613
2016	1815177323.17151
2017	1943577277.53361
2018	2096651730.46224
2019	2309184975.16546
2020	2325545908.7679
2021	2522530277.5963