Year	U.S. dollars (Billions)
1980	10.089
1981	10.763
1982	7.000
1983	5.259
1984	7.464
1985	6.914
1986	2.378
1987	3.719
1988	2.527
1989	3.934
1990	7.942
1991	1.358
1992	2.274
1993	3.046
1994	0.029
1995	0.108
1996	4.351
1997	8.689
1998	2.970
1999	5.444
2000	16.794
2001	9.373
2002	3.642
2003	7.191
2004	9.505
2005	23.778
2006	38.459
2007	19.680
2008	22.267
2009	7.848
2010	12.196
2011	43.517
2012	73.101
2013	73.213
2014	54.491
2015	17.551
2016	13.200
2017	27.500
2018	41.242
2019	37.321
2020	21.103
2021	47.951
2022	59.038
2023	46.768
2024	41.043
2025	38.113
2026	38.401
2027	40.018
2028	41.775
2029	44.072