Year	current US$
1990	138053980.737929
1991	130052906.53047
1992	139340206.905101
1993	129524426.03583
1994	75920823.5078602
1995	92397826.9355596
1996	92312231.6198243
1997	85667908.8761803
1998	95945458.8900347
1999	114868699.84252
2000	105587534.058599
2001	109931655.577731
2002	125600756.029556
2003	156155811.230402
2004	174181503.29037
2005	189231112.118504
2006	196076401.089401
2007	216575346.476033
2008	261523983.591305
2009	257191237.277968
2010	259544636.955072
2011	298502964.627021
2012	310024594.33607
2013	327589007.270982
2014	346217684.600872
2015	303727255.558149
2016	330424993.270539
2017	355999236.566554
2018	389689871.581811
2019	377883977.592879
2020	412521865.156316
2021	429618433.804323