Year	U.S. dollars (Billions)
1980	-0.193
1981	-1.116
1982	-2.084
1983	-1.480
1984	-3.393
1985	-2.231
1986	-1.492
1987	-1.005
1988	-1.986
1989	-2.506
1990	-2.593
1991	1.664
1992	3.669
1993	2.193
1994	0.191
1995	0.387
1996	-0.184
1997	0.119
1998	-2.479
1999	-1.724
2000	-1.163
2001	-0.033
2002	0.614
2003	1.943
2004	3.418
2005	2.911
2006	1.752
2007	2.269
2008	0.888
2009	-4.424
2010	-4.318
2011	-6.088
2012	-10.146
2013	-6.390
2014	-2.746
2015	-12.143
2016	-19.831
2017	-14.394
2018	-5.962
2019	-10.894
2020	-11.167
2021	-18.436
2022	-16.551
2023	-4.711
2024	-21.806
2025	-7.785
2026	-8.965
2027	-10.656
2028	-12.564
2029	-14.101