Year	U.S. dollars (Billions)
2000	-0.106
2001	-0.087
2002	-0.026
2003	-0.100
2004	-0.055
2005	0.021
2006	-0.082
2007	-0.021
2008	-0.505
2009	-0.232
2010	0.021
2011	-0.058
2012	-0.558
2013	-0.268
2014	-1.060
2015	-0.881
2016	-0.747
2017	-0.740
2018	-0.696
2019	-0.605
2020	-0.498
2021	-0.623
2022	-0.756
2023	-1.164
2024	-1.181
2025	-1.239
2026	-1.299
2027	-1.283
2028	-1.386
2029	-1.326