Year	U.S. dollars (Billions)
1980	0.183
1981	0.194
1982	0.193
1983	0.181
1984	0.182
1985	0.166
1986	0.148
1987	0.155
1988	0.176
1989	0.173
1990	0.215
1991	0.228
1992	0.269
1993	0.301
1994	0.403
1995	0.469
1996	0.511
1997	0.527
1998	0.458
1999	0.488
2000	0.420
2001	0.410
2002	0.346
2003	0.353
2004	0.398
2005	0.477
2006	0.539
2007	0.620
2008	0.699
2009	0.736
2010	0.847
2011	1.050
2012	1.185
2013	1.286
2014	1.336
2015	1.308
2016	1.379
2017	1.470
2018	1.615
2019	1.619
2020	1.536
2021	1.489
2022	1.560
2023	1.631
2024	1.707
2025	1.820
2026	1.933
2027	2.056
2028	2.184
2029	2.318