Year	U.S. dollars (Billions)
1980	4.087
1981	4.011
1982	3.805
1983	3.799
1984	3.509
1985	3.250
1986	3.535
1987	3.885
1988	5.400
1989	5.238
1990	4.757
1991	5.596
1992	6.466
1993	7.349
1994	8.077
1995	7.149
1996	7.608
1997	7.272
1998	5.558
1999	5.072
2000	5.169
2001	4.531
2002	4.387
2003	5.488
2004	6.279
2005	7.339
2006	8.355
2007	9.545
2008	11.671
2009	11.619
2010	14.251
2011	17.985
2012	21.295
2013	21.261
2014	23.211
2015	21.723
2016	20.759
2017	22.743
2018	24.110
2019	24.751
2020	23.848
2021	26.113
2022	31.610
2023	30.998
2024	31.716
2025	32.640
2026	33.567
2027	34.658
2028	35.915
2029	37.198