Year	current US$
1990	640558765.096812
1991	321747880.850427
1992	500011671.390308
1993	888989930.805189
1994	1093026230.02575
1995	1040696091.45985
1996	893894793.5399
1997	665037472.219372
1998	1549457525.80351
1999	829644750.319399
2000	689158395.313607
2001	742240022.41591
2002	1036842213.37603
2003	1593615124.06758
2004	1739555501.19794
2005	1865785289.91564
2006	2091384369.53809
2007	1624175164.29602
2008	2188845323.09877
2009	2529990618.20227
2010	1664333770.4442
2011	2696944034.45522
2012	1265623763.62625
2013	796543894.980056
2014	220842489.074375
2015	938998114.30321
2016	1139412040.55593
2017	1765145319.41669
2018	1975403716.12169
2019	1722458030.5708
2020	285991444.066189
2021	524089045.466887