Year	U.S. dollars (Billions)
1980	1.276
1981	1.427
1982	1.469
1983	1.419
1984	1.387
1985	1.402
1986	1.430
1987	1.573
1988	1.864
1989	2.177
1990	0.577
1991	0.637
1992	0.590
1993	0.465
1994	0.523
1995	0.993
1996	1.234
1997	1.322
1998	1.588
1999	1.308
2000	1.355
2001	1.167
2002	1.474
2003	1.729
2004	2.000
2005	2.393
2006	2.812
2007	3.144
2008	3.783
2009	4.150
2010	4.677
2011	4.735
2012	5.332
2013	5.510
2014	5.612
2015	5.126
2016	3.317
2017	3.592
2018	3.996
2019	4.016
2020	2.912
2021	3.084
2022	3.631
2023	3.751
2024	4.337
2025	4.600
2026	4.788
2027	5.055
2028	5.287
2029	5.590