Year	U.S. dollars (Billions)
1980	2.728
1981	2.854
1982	2.963
1983	3.071
1984	2.837
1985	3.294
1986	3.636
1987	4.086
1988	4.104
1989	4.275
1990	2.678
1991	2.821
1992	1.566
1993	0.771
1994	0.926
1995	1.452
1996	1.348
1997	1.181
1998	1.125
1999	1.057
2000	1.137
2001	1.268
2002	1.397
2003	1.595
2004	1.992
2005	2.523
2006	3.414
2007	4.235
2008	5.623
2009	4.584
2010	7.185
2011	10.410
2012	12.278
2013	12.582
2014	12.227
2015	11.620
2016	11.154
2017	11.481
2018	13.207
2019	14.206
2020	13.313
2021	15.286
2022	17.146
2023	19.862
2024	21.943
2025	23.509
2026	25.382
2027	27.246
2028	29.215
2029	31.326