Year	U.S. dollars (Billions)
1992	-0.049
1993	-0.207
1994	-0.167
1995	-0.102
1996	-0.082
1997	-0.045
1998	-0.097
1999	-0.010
2000	-0.016
2001	-0.052
2002	-0.015
2003	-0.005
2004	-0.057
2005	-0.296
2006	-0.372
2007	-1.194
2008	-1.059
2009	-0.717
2010	-0.581
2011	-0.413
2012	-0.681
2013	-0.885
2014	-0.316
2015	-0.477
2016	-0.291
2017	0.159
2018	-0.380
2019	-0.185
2020	0.336
2021	0.735
2022	1.635
2023	-0.088
2024	-0.275
2025	-0.312
2026	-0.362
2027	-0.405
2028	-0.458
2029	-0.539