Year	U.S. dollars (Billions)
1980	68.606
1981	59.726
1982	64.939
1983	52.378
1984	34.951
1985	31.943
1986	35.840
1987	33.932
1988	39.314
1989	40.006
1990	41.448
1991	40.250
1992	36.333
1993	47.450
1994	25.746
1995	25.021
1996	32.099
1997	28.819
1998	21.089
1999	19.147
2000	19.077
2001	7.246
2002	8.720
2003	9.022
2004	10.275
2005	12.720
2006	15.403
2007	18.598
2008	22.665
2009	18.626
2010	22.340
2011	26.406
2012	30.074
2013	34.908
2014	38.355
2015	40.154
2016	38.086
2017	39.461
2018	48.037
2019	50.891
2020	49.613
2021	58.182
2022	65.927
2023	67.268
2024	73.761
2025	83.082
2026	91.930
2027	102.155
2028	111.926
2029	122.371