Year	current US$
1990	3998807.66690483
1991	3458498.44746169
1992	3750863.51359243
1993	4066386.81513381
1994	4100232.02681202
1995	4586142.36755349
1996	15439783.2854845
1997	20529564.5848306
1998	20714171.3458803
1999	23786350.0599439
2000	26357487.9863501
2001	33767903.1934615
2002	43933022.3573264
2003	51271435.4289933
2004	58465457.1634834
2005	67472116.2967749
2006	85097547.9466239
2007	103012992.527706
2008	107887712.999921
2009	122069250.379077
2010	138032909.549377
2011	138702002.700026
2012	137951017.296634
2013	151282801.16455
2014	174751230.533068
2015	191598240.393222
2016	242043867.651205
2017	257055423.396859
2018	290706295.66116
2019	297686129.443453
2020	324817242.866029
2021	377216303.837324