Year	current US$
1990	2164144024.34493
1991	-27275712164.3409
1992	4440958011.52076
1993	5542506789.88872
1994	5409215981.79957
1995	7163947155.35324
1996	9179975722.21878
1997	9578598623.09183
1998	4111719186.91914
1999	6583264633.53547
2000	13576612418.5026
2001	8184736798.66909
2002	5067029501.30368
2003	10356610898.0179
2004	20428872180.2451
2005	34165996312.6116
2006	51996489915.3944
2008	61451126848.8497
2011	59487425796.4456
2012	64991079896.5036
2013	62251477005.189
2014	51351367719.3276
2015	15556349096.8222
2016	9002494481.85853
2017	22085317170.8951
2018	29198590253.3351
2019	19546495966.0786