Year	U.S. dollars (Billions)
1980	0.428
1981	0.435
1982	0.362
1983	0.401
1984	0.360
1985	0.288
1986	0.331
1987	0.434
1988	0.496
1989	0.519
1990	0.635
1991	0.743
1992	0.863
1993	0.865
1994	0.915
1995	1.032
1996	0.977
1997	1.027
1998	0.949
1999	0.937
2000	0.922
2001	0.774
2002	0.856
2003	1.256
2004	1.598
2005	1.730
2006	1.720
2007	1.759
2008	1.652
2009	1.937
2010	2.356
2011	2.571
2012	2.465
2013	2.345
2014	2.477
2015	2.202
2016	2.206
2017	2.424
2018	2.472
2019	2.323
2020	2.092
2021	2.427
2022	2.325
2023	2.249
2024	2.395
2025	2.524
2026	2.640
2027	2.736
2028	2.837
2029	3.037