Year	U.S. dollars (Billions)
1980	0.132
1981	0.143
1982	0.150
1983	0.162
1984	0.168
1985	0.174
1986	0.197
1987	0.238
1988	0.273
1989	0.272
1990	0.293
1991	0.254
1992	0.248
1993	0.260
1994	0.263
1995	0.308
1996	0.324
1997	0.362
1998	0.398
1999	0.418
2000	0.454
2001	0.474
2002	0.517
2003	0.616
2004	0.700
2005	0.818
2006	0.876
2007	1.071
2008	1.353
2009	1.274
2010	1.511
2011	1.842
2012	1.931
2013	1.967
2014	1.933
2015	2.126
2016	2.218
2017	2.445
2018	2.651
2019	2.618
2020	2.586
2021	2.623
2022	2.869
2023	2.897
2024	3.110
2025	3.395
2026	3.705
2027	3.980
2028	4.283
2029	4.654