Year	current US$
1990	33202221.2343007
1991	36890650.1062581
1992	38178432.191923
1993	35195278.9861582
1994	31337487.6334919
1995	32561610.8096298
1996	28014452.1468585
1997	37913470.0800501
1998	37148555.2236035
1999	31241773.2130607
2000	33596516.3769674
2001	35708587.2850398
2002	38693302.044775
2003	43706794.7867553
2004	46551737.3744001
2005	53279702.9877963
2006	53461861.2896132
2007	50991431.7924186
2008	58774651.4338929
2009	68767517.95509
2010	76018127.7533182
2011	90976579.1279679
2012	125212302.136037
2013	137059629.452917
2014	157915852.054608
2015	172473183.336351
2016	191049474.952782
2017	254810399.968634
2018	302851704.568706
2019	277296669.055406
2020	299257607.798629
2021	358422257.962462