Year	current US$
1990	159346426.726662
1991	167160758.293982
1992	176156625.727645
1993	150316091.924946
1994	128717998.270277
1995	131775157.361037
1996	146280008.653199
1997	160428613.570168
1998	169821966.736473
1999	175734974.323466
2000	189328434.831529
2001	225507491.441392
2002	255537027.4492
2003	324649036.484478
2004	355205225.947122
2005	409253274.802161
2006	491947190.860969
2007	527941586.704492
2008	537291560.67003
2009	525836787.071761
2010	613289059.906208
2011	663979902.90901
2012	668627458.809313
2013	717946794.573686
2014	742103514.157001
2015	741704225.62741
2016	657540539.751822
2017	682861943.979626
2018	696598124.436843
2019	700989669.919361
2020	652061223.505115
2021	670711985.938469