Year	current US$
1990	-3925687893.60742
1991	-1305960210.59453
1992	-1617166651.24635
1993	-1485994363.68301
1994	-1600553494.3913
1995	-3653372602.57831
1996	-5199828322.56477
1997	-4308850655.60747
1998	-4896197730.17648
1999	-4246457861.94186
2000	-2879674007.08803
2001	-2631506951.1964
2002	-2905820292.28561
2003	-3914439756.23913
2004	-3376892873.30361
2005	-4094315542.66055
2006	324403703.711201
2007	2629415873.7329
2008	16633203989.0477
2009	13318974416.6854
2010	8829249159.15767
2011	8538633970.90194
2012	6095228352.56181
2013	12118688259.3003
2014	14080872458.7045
2015	13498359372.004
2016	9357231037.41854
2017	9642001959.09647
2018	6751043743.23147
2019	10651896054.0513
2020	15373473041.1211
2021	14315840286.7835