Year	U.S. dollars (Billions)
1980	-0.153
1981	-0.238
1982	-0.181
1983	-0.181
1984	-0.116
1985	-0.150
1986	-0.161
1987	-0.127
1988	-0.100
1989	-0.120
1990	-0.161
1991	-0.138
1992	-0.116
1993	-0.098
1994	-0.059
1995	-0.057
1996	-0.032
1997	-0.081
1998	-0.091
1999	-0.020
2000	-0.070
2001	-0.071
2002	-0.050
2003	-0.045
2004	-0.019
2005	-0.098
2006	-0.164
2007	-0.131
2008	-0.232
2009	-0.146
2010	-0.188
2011	-0.314
2012	-0.302
2013	-0.414
2014	-0.276
2015	-0.147
2016	0.065
2017	-0.232
2018	-1.387
2019	-3.558
2020	-0.893
2021	-1.982
2022	3.448
2023	3.441
2024	4.841
2025	3.624
2026	6.287
2027	10.214
2028	14.068
2029	11.440