Year	current US$
1995	12653415.4425866
1996	13072190.5801095
1997	13723861.3746728
1998	12795320.2287181
1999	8920142.89290364
2000	9134140.71790048
2001	8989454.13475085
2002	8686060.96982057
2003	9586511.05353702
2004	12119777.316414
2005	14260872.2326647
2006	15801456.9141222
2007	19667578.6598741
2008	24851081.1417211
2009	23828046.7013016
2010	29192858.6744426
2011	31157851.1194094
2012	31331880.6107682
2013	30006569.6205934
2014	32109180.4203757
2015	27918009.0588197
2016	25170985.9175378
2017	23811375.7525745
2018	20661742.9441451
2019	24104969.941082
2020	26651823.720286
2021	28465784.8573027