Year	U.S. dollars (Billions)
1980	0.058
1981	0.069
1982	0.079
1983	0.078
1984	0.091
1985	0.101
1986	0.119
1987	0.136
1988	0.161
1989	0.179
1990	0.203
1991	0.201
1992	0.223
1993	0.243
1994	0.272
1995	0.293
1996	0.312
1997	0.351
1998	0.366
1999	0.389
2000	0.421
2001	0.458
2002	0.481
2003	0.469
2004	0.507
2005	0.547
2006	0.644
2007	0.689
2008	0.778
2009	0.774
2010	0.779
2011	0.836
2012	0.825
2013	0.875
2014	0.953
2015	0.957
2016	1.007
2017	1.058
2018	1.076
2019	1.107
2020	0.884
2021	0.859
2022	0.973
2023	1.068
2024	1.134
2025	1.207
2026	1.279
2027	1.345
2028	1.411
2029	1.481