Year	U.S. dollars (Billions)
1980	-0.432
1981	-0.452
1982	-0.307
1983	-0.304
1984	-0.272
1985	-0.272
1986	-0.268
1987	-0.306
1988	-0.414
1989	-0.381
1990	-0.444
1991	-0.451
1992	-0.506
1993	-0.456
1994	-0.289
1995	-0.323
1996	-0.337
1997	-0.270
1998	-0.339
1999	-0.341
2000	-0.328
2001	-0.246
2002	-0.323
2003	-0.437
2004	-0.513
2005	-0.678
2006	-0.724
2007	-1.337
2008	-1.906
2009	-0.856
2010	-0.568
2011	-1.158
2012	-1.548
2013	-1.563
2014	-1.382
2015	-1.016
2016	-0.797
2017	-1.527
2018	-2.037
2019	-1.853
2020	-2.666
2021	-3.329
2022	-5.530
2023	-4.758
2024	-3.147
2025	-1.930
2026	-2.349
2027	-2.246
2028	-2.372
2029	-2.250