Year	constant 2010 US$
1970	4270937996.08983
1971	4649616509.43362
1972	5193629136.96608
1973	5651519330.32419
1974	7673428705.93986
1975	9361799226.47657
1976	12887205787.3067
1977	11319015693.2779
1978	8194777383.73957
1979	7887680322.76834
1980	8077946210.7663
1981	8635666245.42084
1982	8397652372.55665
1983	8879847697.42145
1984	9946616568.60413
1985	9687619761.32887
1986	9790292132.43157
1987	8116564932.32319
1988	9158130676.43398
1989	10107455780.7891
1990	10116213624.1673
1991	10763884552.1726
1992	10196732224.3232
1993	10486811432.221
1994	11119512416.5623
1995	11525029724.0736
1996	11910526564.8278
1997	12502205318.0141
1998	13435750295.4063
1999	11981431378.1556
2000	10895497230.4001
2001	11780393411.3163
2002	12184913514.4241
2003	12249016477.0114
2004	11581424798.3357
2005	12495161181.7225
2006	11506111993.3894
2007	11919508060.4659
2008	11313313249.1859
2009	12255479541.4246
2010	12472296425.0308
2011	12801335655.4713
2012	14441685250.8089
2013	15512437426.6678
2014	17518580486.2474
2015	17502177001.6475
2016	18046534322.6926
2017	18415067534.1139