Year	U.S. dollars (Billions)
1980	3.932
1981	4.416
1982	4.713
1983	4.953
1984	5.003
1985	5.033
1986	6.445
1987	6.794
1988	6.364
1989	4.279
1990	4.187
1991	4.373
1992	5.403
1993	5.615
1994	6.321
1995	6.759
1996	7.054
1997	7.389
1998	8.163
1999	8.414
2000	8.725
2001	9.268
2002	9.972
2003	10.575
2004	11.771
2005	13.134
2006	15.795
2007	17.957
2008	22.648
2009	24.538
2010	27.134
2011	29.524
2012	31.679
2013	34.503
2014	36.900
2015	38.642
2016	39.949
2017	41.667
2018	43.432
2019	44.566
2020	43.762
2021	46.362
2022	48.722
2023	50.989
2024	53.570
2025	56.556
2026	59.709
2027	63.038
2028	66.553
2029	70.263