Year	current US$
1990	76084762.2021918
1991	72363636.3636365
1992	37223225.2769801
1993	42000449.5229959
1994	35064058.5129799
1995	40324450.9569825
1996	27908882.0860304
1997	31929498.9916959
1998	43340383.3525645
1999	43188787.9302244
2000	45823806.5247388
2001	51896798.3932995
2002	59776251.3782394
2003	72036935.6835565
2004	94501156.5352939
2005	132249832.585582
2006	176705202.283388
2007	261573904.855024
2008	339528924.137855
2009	252310803.071597
2010	277391346.519116
2011	305311195.945177
2012	326853743.089974
2013	301002327.015736
2014	254766307.927874
2015	296117168.75877
2016	263833083.210589
2017	273378571.120664
2018	298619842.353645
2019	334933352.269566
2020	310560341.825163
2021	366371901.692372