Year	U.S. dollars (Billions)
1980	123.478
1981	102.245
1982	89.958
1983	85.037
1984	81.237
1985	84.467
1986	117.063
1987	145.411
1988	158.097
1989	159.816
1990	200.149
1991	205.369
1992	228.732
1993	218.720
1994	238.622
1995	288.301
1996	279.292
1997	253.022
1998	258.876
1999	258.500
2000	236.897
2001	236.748
2002	258.200
2003	318.004
2004	369.047
2005	385.927
2006	408.281
2007	470.978
2008	517.270
2009	482.730
2010	481.814
2011	523.239
2012	496.467
2013	521.799
2014	535.529
2015	462.383
2016	475.931
2017	502.587
2018	543.546
2019	535.925
2020	525.843
2021	601.149
2022	583.895
2023	630.110
2024	655.192
2025	673.248
2026	693.456
2027	714.154
2028	737.174
2029	759.320