Year	current US$
1990	193267350.403405
1991	195392759.346981
1992	215020236.240023
1993	210100941.33881
1994	235920866.849858
1995	269096760.039962
1996	246921502.173679
1997	193264340.728564
1998	183741615.735977
1999	172722985.53036
2000	153459896.304902
2001	140880186.488238
2002	146541632.100564
2003	168908157.299524
2004	167195195.421303
2005	179084847.70308
2006	183355721.612116
2007	221859663.649821
2008	246037047.155476
2009	245816641.090071
2010	232111117.575578
2011	232696160.932268
2012	211744561.338165
2013	222461801.046319
2014	219667307.235158
2015	178775190.245348
2016	169690541.79134
2017	165013755.03581
2018	182637224.659287
2019	176647687.838166
2020	186255680.097652
2021	199616598.808679