Year	U.S. dollars (Billions)
1980	-0.041
1981	-0.181
1982	-0.119
1983	-0.106
1984	-0.068
1985	-0.067
1986	-0.035
1987	0.020
1988	0.067
1989	-0.016
1990	-0.133
1991	-0.074
1992	-0.040
1993	-0.090
1994	-0.037
1995	-0.031
1996	0.019
1997	-0.060
1998	-0.007
1999	-0.050
2000	-0.070
2001	-0.080
2002	0.015
2003	-0.102
2004	-0.327
2005	-0.224
2006	-0.465
2007	-0.342
2008	-0.513
2009	-0.064
2010	-0.133
2011	-0.191
2012	-0.043
2013	-0.401
2014	-0.269
2015	-0.200
2016	-0.175
2017	-0.356
2018	-0.472
2019	-0.699
2020	-0.608
2021	-0.685
2022	-0.861
2023	-0.256
2024	-0.367
2025	-0.418
2026	-0.480
2027	-0.513
2028	-0.548
2029	-0.574