Year	U.S. dollars (Billions)
1980	-0.202
1981	-0.468
1982	-0.675
1983	-0.531
1984	-0.512
1985	-0.685
1986	-0.664
1987	-0.538
1988	-0.833
1989	-1.217
1990	-1.104
1991	-0.646
1992	-0.236
1993	-0.129
1994	-0.227
1995	-0.616
1996	-0.953
1997	-0.831
1998	-0.568
1999	-0.350
2000	-0.337
2001	-1.018
2002	0.157
2003	0.176
2004	0.176
2005	-0.557
2006	0.572
2007	0.957
2008	0.278
2009	2.086
2010	3.240
2011	-2.227
2012	-0.447
2013	2.388
2014	1.406
2015	2.875
2016	4.262
2017	-1.331
2018	-9.567
2019	-4.490
2020	-5.435
2021	-4.575
2022	-18.639
2023	-3.334
2024	-3.677
2025	-13.437
2026	-16.504
2027	-18.477
2028	-20.561
2029	-23.109