Year	U.S. dollars (Billions)
1980	23.523
1981	25.760
1982	30.479
1983	37.254
1984	41.888
1985	48.841
1986	54.076
1987	77.359
1988	92.530
1989	115.362
1990	96.087
1991	48.431
1992	44.168
1993	49.526
1994	54.550
1995	63.250
1996	71.118
1997	79.777
1998	89.189
1999	95.039
2000	104.752
2001	102.273
2002	90.261
2003	85.163
2004	82.855
2005	94.127
2006	112.902
2007	137.055
2008	170.797
2009	198.316
2010	230.024
2011	247.726
2012	294.482
2013	303.194
2014	321.634
2015	350.119
2016	351.443
2017	246.826
2018	263.156
2019	317.894
2020	382.525
2021	423.300
2022	475.231
2023	393.909
2024	347.594
2025	328.845
2026	374.251
2027	426.392
2028	482.639
2029	539.606