Year	U.S. dollars (Billions)
1991	-0.095
1992	-0.038
1993	0.031
1994	0.038
1995	0.026
1996	-0.037
1997	0.074
1998	-0.076
1999	-0.060
2000	-0.070
2001	-0.062
2002	-0.105
2003	-0.099
2004	0.063
2005	0.088
2006	0.372
2007	0.172
2008	-0.691
2009	-0.342
2010	-0.885
2011	-4.512
2012	-5.381
2013	-4.732
2014	-1.934
2015	-0.948
2016	-0.700
2017	-1.155
2018	-2.207
2019	-2.162
2020	-0.675
2021	-2.108
2022	-2.303
2023	0.245
2024	-1.655
2025	-2.162
2026	-2.294
2027	-2.097
2028	-2.194
2029	-2.274