Year	U.S. dollars (Billions)
1980	12.217
1981	13.636
1982	11.147
1983	6.119
1984	5.819
1985	5.686
1986	7.059
1987	8.832
1988	9.137
1989	9.630
1990	11.204
1991	13.502
1992	15.515
1993	18.064
1994	21.040
1995	23.267
1996	24.730
1997	26.155
1998	27.704
1999	26.178
2000	24.892
2001	22.802
2002	14.863
2003	13.159
2004	14.959
2005	18.986
2006	21.416
2007	25.603
2008	33.151
2009	34.565
2010	43.967
2011	52.354
2012	55.938
2013	62.857
2014	62.546
2015	58.218
2016	57.580
2017	65.068
2018	65.370
2019	62.230
2020	53.666
2021	60.762
2022	70.165
2023	77.241
2024	82.605
2025	86.294
2026	90.111
2027	94.192
2028	98.607
2029	103.270