Year	U.S. dollars (Billions)
1980	-0.054
1981	-0.508
1982	-0.190
1983	-0.155
1984	-0.073
1985	-0.152
1986	-0.084
1987	-0.096
1988	-0.071
1989	-0.078
1990	-0.162
1991	-0.244
1992	-0.367
1993	-0.550
1994	-0.254
1995	-0.144
1996	-0.307
1997	-0.405
1998	-0.522
1999	-0.965
2000	-0.386
2001	-0.427
2002	-0.105
2003	0.102
2004	-0.590
2005	-1.105
2006	-1.040
2007	-2.156
2008	-3.406
2009	-1.398
2010	-2.770
2011	-3.541
2012	-4.911
2013	-5.704
2014	-3.694
2015	-2.824
2016	-2.841
2017	-2.002
2018	-2.043
2019	-1.526
2020	-1.774
2021	-2.157
2022	-1.517
2023	-1.264
2024	-1.393
2025	-1.680
2026	-1.930
2027	-2.083
2028	-2.182
2029	-2.366