Year	U.S. dollars (Billions)
1980	4.095
1981	5.220
1982	5.470
1983	6.069
1984	4.931
1985	4.214
1986	5.032
1987	4.216
1988	5.584
1989	4.046
1990	4.904
1991	6.984
1992	7.158
1993	7.249
1994	7.871
1995	9.062
1996	9.788
1997	9.965
1998	9.260
1999	8.837
2000	8.856
2001	8.496
2002	7.196
2003	7.691
2004	9.624
2005	10.738
2006	13.430
2007	17.856
2008	24.615
2009	22.355
2010	27.129
2011	33.737
2012	33.296
2013	38.651
2014	40.378
2015	36.211
2016	36.090
2017	38.997
2018	40.225
2019	37.925
2020	35.432
2021	39.951
2022	41.953
2023	43.871
2024	45.817
2025	48.033
2026	51.395
2027	54.206
2028	57.191
2029	60.351