Year	U.S. dollars (Billions)
1980	1.946
1981	2.229
1982	2.296
1983	2.319
1984	2.290
1985	2.339
1986	2.587
1987	2.566
1988	2.530
1989	2.779
1990	2.221
1991	1.333
1992	0.843
1993	1.461
1994	2.361
1995	2.882
1996	3.200
1997	2.259
1998	2.560
1999	3.209
2000	3.483
2001	3.928
2002	4.348
2003	5.611
2004	7.185
2005	8.052
2006	8.896
2007	10.677
2008	12.881
2009	12.044
2010	11.937
2011	12.899
2012	12.324
2013	12.784
2014	13.246
2015	11.389
2016	11.862
2017	13.053
2018	15.157
2019	15.399
2020	15.192
2021	17.984
2022	19.083
2023	22.743
2024	25.431
2025	26.911
2026	28.691
2027	30.542
2028	32.534
2029	34.674