Year	U.S. dollars (Billions)
1980	41.503
1981	39.627
1982	7.575
1983	-16.852
1984	-18.401
1985	-12.932
1986	-11.785
1987	-9.760
1988	-7.331
1989	-9.525
1990	-4.147
1991	-27.509
1992	-17.717
1993	-17.245
1994	-10.473
1995	-5.318
1996	0.679
1997	0.305
1998	-13.132
1999	0.411
2000	14.317
2001	9.353
2002	11.873
2003	28.048
2004	51.926
2005	89.990
2006	103.094
2007	99.403
2008	139.743
2009	28.333
2010	74.415
2011	164.990
2012	173.664
2013	143.068
2014	80.260
2015	-52.640
2016	-24.454
2017	12.126
2018	72.956
2019	38.451
2020	-25.547
2021	41.718
2022	151.519
2023	42.076
2024	5.255
2025	-6.764
2026	-17.371
2027	-28.249
2028	-37.261
2029	-41.940