Year	U.S. dollars (Billions)
1980	0.157
1981	0.154
1982	0.155
1983	0.152
1984	0.145
1985	0.152
1986	0.210
1987	0.260
1988	0.292
1989	0.295
1990	0.339
1991	0.353
1992	0.395
1993	0.398
1994	0.448
1995	0.536
1996	0.553
1997	0.540
1998	0.575
1999	0.657
2000	0.609
2001	0.616
2002	0.679
2003	0.825
2004	0.943
2005	1.041
2006	1.084
2007	1.231
2008	1.472
2009	1.662
2010	1.825
2011	2.047
2012	1.913
2013	2.029
2014	2.042
2015	1.750
2016	1.855
2017	1.965
2018	2.073
2019	2.231
2020	1.830
2021	1.999
2022	2.246
2023	2.520
2024	2.718
2025	2.904
2026	3.092
2027	3.293
2028	3.505
2029	3.734