Year	current US$
1990	40463796.957364
1991	39185563.2895042
1992	39007032.9568522
1993	40943448.2667552
1994	44396392.6300481
1995	51215696.8370261
1996	55103581.1341699
1997	60092510.1345508
1998	56144456.8449987
1999	57849961.1557599
2000	56091097.4364657
2001	53042284.3907086
2002	53467412.97145
2003	62471608.1908476
2004	66140699.2950139
2005	87428387.3599451
2006	95054515.2181844
2007	106237580.024739
2008	137121729.225167
2009	143847124.856529
2010	196496046.711993
2011	217041677.230067
2012	216520450.850183
2013	227240200.153279
2014	233862769.861278
2015	252950520.159593
2016	264182001.096382
2017	279538530.06241
2018	277326126.511525
2019	272396846.545248
2020	273160166.113903
2021	279244878.75626