Year	U.S. dollars (Billions)
1980	1.701
1981	1.823
1982	2.050
1983	1.782
1984	2.062
1985	1.755
1986	1.314
1987	1.145
1988	1.877
1989	1.724
1990	0.948
1991	1.138
1992	0.992
1993	1.122
1994	1.331
1995	1.273
1996	1.374
1997	1.240
1998	0.981
1999	0.977
2000	0.941
2001	1.084
2002	1.250
2003	1.380
2004	1.439
2005	1.610
2006	1.884
2007	2.159
2008	2.511
2009	2.454
2010	2.578
2011	2.942
2012	3.802
2013	4.916
2014	5.007
2015	4.252
2016	3.855
2017	3.713
2018	4.085
2019	4.074
2020	4.059
2021	4.148
2022	4.095
2023	3.906
2024	4.558
2025	4.594
2026	4.690
2027	4.909
2028	5.185
2029	5.483