Year	U.S. dollars (Billions)
1980	-12.807
1981	-11.735
1982	-16.311
1983	-6.837
1984	0.040
1985	-0.228
1986	-5.651
1987	-1.435
1988	4.173
1989	1.034
1990	-3.785
1991	-1.405
1992	6.145
1993	-0.592
1994	-1.681
1995	-18.712
1996	-23.843
1997	-32.133
1998	-34.993
1999	-26.784
2000	-26.531
2001	-24.890
2002	-9.407
2003	2.193
2004	8.959
2005	11.679
2006	10.774
2007	-2.754
2008	-35.602
2009	-29.328
2010	-86.718
2011	-83.576
2012	-92.678
2013	-88.384
2014	-110.493
2015	-63.409
2016	-30.529
2017	-25.337
2018	-54.794
2019	-68.022
2020	-28.208
2021	-46.358
2022	-48.253
2023	-28.616
2024	-31.902
2025	-35.740
2026	-44.718
2027	-48.847
2028	-53.905
2029	-61.163