Year	U.S. dollars (Billions)
1992	1.087
1993	0.282
1994	0.565
1995	-0.097
1996	0.015
1997	0.023
1998	-0.147
1999	-0.735
2000	-0.564
2001	0.008
2002	0.206
2003	-0.240
2004	-0.927
2005	-0.653
2006	-0.725
2007	-1.989
2008	-2.967
2009	-0.546
2010	-0.371
2011	-0.431
2012	0.604
2013	1.598
2014	2.549
2015	1.645
2016	2.138
2017	3.020
2018	3.184
2019	3.184
2020	3.878
2021	2.049
2022	-0.610
2023	3.054
2024	1.941
2025	1.600
2026	1.657
2027	1.690
2028	1.739
2029	1.784