Year	current US$
1990	12541035461.6908
1991	12710273238.6863
1992	16258933267.0232
1993	12036325618.5261
1994	11160765233.8546
1995	15074718200.1163
1996	12609547840.6519
1997	13252309476.9438
1998	14845941521.2905
1999	11867144792.9549
2000	7836623969.80709
2001	8198683027.65673
2002	7713351753.93884
2003	7845953645.77162
2004	6996165815.67112
2005	3377491308.77156
2006	1315308587.90163
2007	3855927681.47025
2008	-3234314472.12723
2009	-3378337630.37229
2010	-4449335036.57699
2011	250218693.541464
2012	-1027430306.96641
2013	5891211705.16106
2014	4051754614.86575
2015	4321482006.42016
2016	6143418150.87223
2017	10242629910.551
2018	10612666254.2413
2019	10488456728.7058
2020	3588322403.20876
2021	7755306634.50228