Year	U.S. dollars (Billions)
1990	10.144
1991	9.450
1992	7.793
1993	7.569
1994	7.959
1995	8.263
1996	10.117
1997	10.386
1998	12.099
1999	11.769
2000	11.340
2001	11.244
2002	10.735
2003	9.574
2004	9.465
2005	9.046
2006	8.141
2007	7.785
2008	6.707
2009	9.666
2010	12.042
2011	14.100
2012	17.116
2013	19.093
2014	19.499
2015	19.969
2016	20.555
2017	22.046
2018	37.065
2019	26.033
2020	26.878
2021	36.016
2022	31.291
2023	32.216
2024	34.405
2025	35.312
2026	36.424
2027	37.541
2028	38.749
2029	39.923