Year	U.S. dollars (Billions)
1980	35.357
1981	17.617
1982	23.369
1983	35.204
1984	61.171
1985	19.045
1986	43.009
1987	53.385
1988	29.501
1989	7.991
1990	8.217
1991	9.704
1992	12.528
1993	16.736
1994	20.712
1995	26.407
1996	31.352
1997	34.146
1998	34.580
1999	36.444
2000	39.585
2001	41.297
2002	44.563
2003	50.233
2004	62.877
2005	73.197
2006	84.301
2007	98.426
2008	124.756
2009	129.022
2010	143.212
2011	171.312
2012	195.169
2013	212.728
2014	232.888
2015	236.795
2016	252.146
2017	277.071
2018	304.470
2019	331.818
2020	346.310
2021	370.076
2022	407.965
2023	433.702
2024	465.814
2025	505.531
2026	546.491
2027	589.854
2028	635.648
2029	684.010