Year	U.S. dollars (Billions)
1980	0.170
1981	0.194
1982	0.183
1983	0.197
1984	0.251
1985	0.284
1986	0.340
1987	0.375
1988	0.429
1989	0.486
1990	0.579
1991	0.613
1992	0.674
1993	0.684
1994	0.713
1995	0.762
1996	0.788
1997	0.805
1998	0.877
1999	0.921
2000	0.932
2001	0.892
2002	0.899
2003	0.987
2004	1.066
2005	1.135
2006	1.268
2007	1.331
2008	1.427
2009	1.400
2010	1.463
2011	1.569
2012	1.598
2013	1.660
2014	1.750
2015	1.807
2016	1.869
2017	1.999
2018	2.061
2019	2.103
2020	1.523
2021	1.850
2022	2.297
2023	2.464
2024	2.582
2025	2.701
2026	2.817
2027	2.931
2028	3.049
2029	3.172