Year	U.S. dollars (Billions)
1980	29.032
1981	34.374
1982	25.630
1983	20.819
1984	20.246
1985	17.360
1986	18.662
1987	22.010
1988	25.947
1989	29.889
1990	33.231
1991	38.249
1992	46.597
1993	49.855
1994	57.517
1995	74.119
1996	78.575
1997	85.730
1998	81.996
1999	75.596
2000	78.250
2001	71.517
2002	70.295
2003	76.508
2004	99.079
2005	122.315
2006	153.840
2007	172.565
2008	179.663
2009	171.794
2010	217.105
2011	251.225
2012	267.165
2013	277.218
2014	259.394
2015	242.515
2016	249.306
2017	276.357
2018	295.428
2019	278.040
2020	254.060
2021	315.601
2022	302.160
2023	335.658
2024	333.760
2025	374.753
2026	391.385
2027	408.875
2028	426.968
2029	445.147