Year	U.S. dollars (Billions)
1992	-0.009
1993	-0.109
1994	-0.305
1995	-0.273
1996	-0.331
1997	-0.297
1998	-0.311
1999	-0.098
2000	-0.068
2001	-0.248
2002	-0.356
2003	-0.192
2004	-0.450
2005	-0.152
2006	-0.029
2007	-0.577
2008	-1.268
2009	-0.637
2010	-0.191
2011	-0.263
2012	-0.309
2013	-0.178
2014	-0.041
2015	-0.176
2016	-0.279
2017	-0.088
2018	0.026
2019	-0.375
2020	-0.363
2021	-0.389
2022	-0.840
2023	0.103
2024	-0.131
2025	-0.464
2026	-0.489
2027	-0.534
2028	-0.562
2029	-0.549