Year	U.S. dollars (Billions)
1995	-0.021
1996	-0.032
1997	-0.013
1998	-0.013
1999	-0.014
2000	-0.015
2001	-0.006
2002	0.008
2003	-0.001
2004	0.005
2005	0.009
2006	-0.004
2007	0.003
2008	0.001
2009	-0.018
2010	-0.029
2011	-0.001
2012	-0.007
2013	-0.017
2014	-0.001
2015	0.021
2016	0.020
2017	-0.002
2018	-0.004
2019	-0.073
2020	0.036
2021	0.058
2022	0.045
2023	0.033
2024	0.019
2025	0.005
2026	-0.005
2027	-0.019
2028	-0.030
2029	-0.042