Year	current US$
1990	2213428216.5472
1991	-27240995745.4201
1992	4474655308.42115
1993	5577644254.6548
1994	5448955223.40082
1995	7210590048.13089
1996	9239274332.71565
1997	9645571028.31143
1998	4165824088.15386
1999	6655294053.83895
2000	13662417233.0769
2001	8255728519.45125
2002	5148234996.2852
2003	10441686892.4165
2004	20530478305.7803
2005	34304362293.6831
2006	52171151128.8459
2007	48241904664.0846
2008	61740334037.4132
2009	29151910261.1789
2010	40227932871.6401
2011	59765132900.2446
2012	65293795831.9277
2013	62552867082.9126
2014	51638156822.7699
2015	15770383030.4433
2016	9199927116.86834
2017	22321320624.5071
2018	29464087534.1999
2019	19811607859.2567