Year	U.S. dollars (Billions)
1980	-0.043
1981	-0.055
1982	-0.051
1983	-0.071
1984	-0.057
1985	-0.059
1986	-0.064
1987	-0.082
1988	-0.079
1989	-0.116
1990	-0.078
1991	-0.025
1992	-0.041
1993	-0.043
1994	-0.106
1995	-0.124
1996	-0.233
1997	-0.202
1998	-0.076
1999	-0.096
2000	0.025
2001	-0.215
2002	-0.172
2003	-0.262
2004	-0.368
2005	-0.482
2006	-0.364
2007	-0.494
2008	-0.928
2009	-1.143
2010	-1.237
2011	-1.368
2012	-2.175
2013	-3.178
2014	-3.090
2015	-2.268
2016	-1.385
2017	-1.260
2018	-1.649
2019	-1.320
2020	-0.231
2021	0.447
2022	-0.011
2023	-0.040
2024	0.263
2025	0.271
2026	0.208
2027	-0.488
2028	-0.755
2029	-0.954