Year	U.S. dollars (Billions)
1980	32.607
1981	32.477
1982	30.678
1983	28.267
1984	25.951
1985	27.231
1986	37.869
1987	47.387
1988	55.435
1989	59.806
1990	79.439
1991	89.904
1992	108.119
1993	95.139
1994	99.692
1995	118.182
1996	122.655
1997	117.211
1998	124.124
1999	127.597
2000	118.658
2001	121.605
2002	134.700
2003	165.185
2004	189.296
2005	197.363
2006	208.767
2007	240.524
2008	263.388
2009	244.402
2010	238.308
2011	245.075
2012	216.361
2013	226.437
2014	229.961
2015	199.414
2016	206.369
2017	221.280
2018	242.423
2019	240.013
2020	228.849
2021	255.705
2022	255.398
2023	287.421
2024	298.949
2025	309.715
2026	321.832
2027	334.087
2028	346.807
2029	359.658