Year	U.S. dollars (Billions)
1980	0.951
1981	0.989
1982	1.045
1983	1.106
1984	1.005
1985	1.170
1986	1.233
1987	1.161
1988	1.088
1989	1.131
1990	1.131
1991	1.167
1992	1.082
1993	0.938
1994	0.924
1995	1.000
1996	0.868
1997	0.972
1998	0.893
1999	0.866
2000	0.870
2001	0.877
2002	0.825
2003	0.785
2004	0.915
2005	1.117
2006	1.273
2007	1.356
2008	1.612
2009	1.775
2010	2.032
2011	2.236
2012	2.333
2013	2.456
2014	2.706
2015	3.104
2016	2.960
2017	3.172
2018	3.037
2019	3.012
2020	3.086
2021	3.351
2022	3.917
2023	4.216
2024	3.075
2025	3.299
2026	3.787
2027	4.226
2028	4.654
2029	4.970