Year	U.S. dollars (Billions)
1980	1.913
1981	1.118
1982	1.119
1983	2.047
1984	2.930
1985	3.685
1986	2.577
1987	1.815
1988	1.182
1989	1.460
1990	1.742
1991	2.053
1992	2.354
1993	2.652
1994	3.081
1995	3.579
1996	3.726
1997	3.515
1998	1.334
1999	1.415
2000	1.720
2001	1.757
2002	1.844
2003	2.260
2004	2.651
2005	3.079
2006	3.934
2007	4.757
2008	5.946
2009	6.431
2010	7.506
2011	8.964
2012	10.194
2013	11.972
2014	13.266
2015	14.418
2016	15.904
2017	17.055
2018	18.131
2019	18.770
2020	18.511
2021	18.533
2022	15.121
2023	15.197
2024	15.190
2025	16.221
2026	17.006
2027	17.951
2028	19.107
2029	20.368