Year	U.S. dollars (Billions)
1980	9.095
1981	6.530
1982	4.748
1983	6.485
1984	7.992
1985	5.547
1986	7.400
1987	11.964
1988	9.551
1989	16.853
1990	2.245
1991	2.528
1992	3.100
1993	5.246
1994	5.961
1995	6.694
1996	8.377
1997	10.241
1998	10.924
1999	10.714
2000	13.134
2001	15.716
2002	18.137
2003	21.355
2004	26.646
2005	35.183
2006	45.264
2007	59.440
2008	64.833
2009	54.812
2010	65.716
2011	66.448
2012	48.948
2013	52.892
2014	60.726
2015	64.534
2016	64.888
2017	48.906
2018	33.432
2019	33.586
2020	34.470
2021	34.800
2022	33.762
2023	25.716
2024	26.865
2025	27.447
2026	28.250
2027	28.806
2028	29.236
2029	29.254