Year	U.S. dollars (Billions)
1980	4.559
1981	4.111
1982	3.853
1983	3.689
1984	3.547
1985	3.736
1986	4.889
1987	3.699
1988	4.079
1989	4.458
1990	6.339
1991	5.754
1992	5.955
1993	5.757
1994	4.463
1995	5.281
1996	6.064
1997	5.673
1998	4.774
1999	4.966
2000	5.397
2001	5.023
2002	5.332
2003	6.510
2004	7.767
2005	9.468
2006	10.164
2007	12.457
2008	15.570
2009	12.188
2010	14.384
2011	18.207
2012	17.181
2013	17.596
2014	18.209
2015	14.385
2016	14.020
2017	14.924
2018	16.830
2019	16.824
2020	15.337
2021	20.229
2022	21.076
2023	20.524
2024	21.013
2025	21.099
2026	21.425
2027	21.831
2028	22.357
2029	22.871