Year	U.S. dollars (Billions)
1980	3.593
1981	4.056
1982	4.264
1983	4.368
1984	4.534
1985	4.278
1986	3.347
1987	3.626
1988	4.481
1989	4.675
1990	4.965
1991	5.209
1992	5.442
1993	5.986
1994	6.411
1995	6.787
1996	7.057
1997	7.318
1998	6.996
1999	7.582
2000	9.063
2001	9.189
2002	9.594
2003	11.075
2004	13.150
2005	15.969
2006	18.505
2007	21.730
2008	25.711
2009	22.938
2010	25.713
2011	28.777
2012	30.749
2013	32.539
2014	33.388
2015	31.051
2016	32.235
2017	35.474
2018	37.802
2019	38.654
2020	34.622
2021	39.289
2022	44.383
2023	44.674
2024	46.790
2025	48.729
2026	50.733
2027	52.982
2028	55.427
2029	58.098