Year	U.S. dollars (Billions)
1980	-0.367
1981	-0.407
1982	-0.497
1983	-0.415
1984	-0.308
1985	-0.301
1986	-0.409
1987	-0.389
1988	-0.359
1989	-0.460
1990	-0.517
1991	-0.554
1992	-0.501
1993	-0.609
1994	-0.648
1995	-0.464
1996	-0.561
1997	-0.438
1998	-0.774
1999	-0.855
2000	-0.697
2001	-0.649
2002	-0.869
2003	-0.817
2004	-0.479
2005	-0.761
2006	-0.755
2007	-0.786
2008	-1.147
2009	-1.226
2010	-1.679
2011	-3.329
2012	-6.790
2013	-6.875
2014	-6.437
2015	-5.968
2016	-3.846
2017	-2.586
2018	-4.780
2019	-2.946
2020	-3.900
2021	-3.661
2022	-6.383
2023	-2.346
2024	-8.882
2025	-10.821
2026	-11.799
2027	-9.308
2028	-6.894
2029	-3.585