Year	U.S. dollars (Billions)
1992	0.222
1993	-0.435
1994	-0.444
1995	-0.458
1996	-0.516
1997	-0.859
1998	-1.017
1999	-0.194
2000	-0.459
2001	-0.529
2002	-0.326
2003	-0.456
2004	-1.192
2005	0.459
2006	-1.388
2007	-3.013
2008	-4.959
2009	-6.133
2010	-8.280
2011	-5.053
2012	-1.862
2013	-7.567
2014	-5.228
2015	-1.831
2016	-1.612
2017	-0.952
2018	0.023
2019	-1.246
2020	-0.178
2021	2.157
2022	2.516
2023	-0.084
2024	-0.334
2025	-0.915
2026	-1.294
2027	-1.057
2028	-0.620
2029	-0.558