Year	U.S. dollars (Billions)
1980	0.714
1981	0.743
1982	0.719
1983	0.690
1984	0.670
1985	0.883
1986	1.158
1987	1.275
1988	1.372
1989	1.354
1990	1.572
1991	1.498
1992	1.494
1993	1.309
1994	0.858
1995	1.117
1996	1.000
1997	0.979
1998	1.036
1999	1.039
2000	0.868
2001	0.899
2002	0.983
2003	1.188
2004	1.310
2005	1.413
2006	1.538
2007	1.755
2008	2.033
2009	2.059
2010	2.141
2011	2.435
2012	2.512
2013	1.692
2014	1.896
2015	1.696
2016	1.825
2017	2.072
2018	2.280
2019	2.278
2020	2.388
2021	2.584
2022	2.459
2023	2.632
2024	2.810
2025	2.986
2026	3.165
2027	3.338
2028	3.515
2029	3.711