Year	U.S. dollars (Billions)
1980	-0.317
1981	-0.303
1982	-0.222
1983	-0.220
1984	-0.273
1985	-0.182
1986	-0.101
1987	-0.242
1988	-0.132
1989	-0.218
1990	-0.080
1991	-0.150
1992	-0.220
1993	-0.310
1994	-0.309
1995	-0.177
1996	-0.194
1997	-0.170
1998	-0.128
1999	-0.241
2000	-0.508
2001	-0.479
2002	-0.282
2003	-0.553
2004	-0.678
2005	-0.290
2006	-0.404
2007	-1.116
2008	-2.130
2009	-0.557
2010	-0.804
2011	-1.409
2012	-1.581
2013	-1.763
2014	-1.372
2015	-0.980
2016	-0.683
2017	-0.288
2018	-1.582
2019	-0.653
2020	0.666
2021	-1.528
2022	-2.083
2023	-1.390
2024	-1.603
2025	-1.638
2026	-1.663
2027	-1.756
2028	-1.856
2029	-1.959