Year	constant 2010 US$
1991	28162467154.431
1992	23297629309.6053
1993	21515202817.7456
1994	20535964031.92
1995	22358545985.4664
1996	22761754653.8964
1997	20956387355.4926
1998	20163700798.2836
1999	22497477452.2999
2000	21922601348.5495
2001	21406440376.0433
2002	22014769136.1575
2003	22642610306.5643
2004	23817738053.3479
2005	24934089447.4949
2006	25672391559.4217
2007	26957119271.8605
2008	27624009568.5602
2009	28022664823.5855
2010	28725444182.5319
2011	29245458323.3861
2012	30813751133.9355
2013	32137289003.1179
2014	34213811095.0386
2015	36308689203.5287
2016	38629408587.4111
2017	40740597189.6044
2018	40267383288.0414