Year	U.S. dollars (Billions)
1990	12.644
1991	14.665
1992	17.959
1993	21.737
1994	28.019
1995	12.796
1996	6.496
1997	6.838
1998	6.322
1999	7.639
2000	9.679
2001	9.853
2002	10.693
2003	11.778
2004	13.868
2005	16.732
2006	19.063
2007	21.651
2008	26.911
2009	25.130
2010	30.907
2011	32.726
2012	35.401
2013	40.415
2014	43.229
2015	42.444
2016	31.318
2017	26.842
2018	21.606
2019	21.888
2020	20.220
2021	19.394
2022	23.534
2023	18.424
2024	16.940
2025	17.176
2026	19.661
2027	22.865
2028	24.978
2029	26.754