Year	constant 2010 US$
1976	260877295.931499
1977	275347511.66486
1978	296432679.577643
1979	311729762.591015
1980	289817723.913387
1981	315037242.165559
1982	331574629.583781
1983	334975394.657991
1984	375784579.033341
1985	433172494.887879
1986	520742206.003278
1987	596770567.773093
1988	644382690.169473
1989	676164079.621915
1990	728333534.440626
1991	759754466.687219
1992	810128667.87006
1993	841799818.10937
1994	875557766.614061
1995	926966771.588534
1996	986933666.124065
1997	1045642048.00133
1998	1109702398.35876
1999	1132342505.81062
2000	1217503419.77999
2001	1277915125.99286
2002	1246678790.68777
2003	1260592721.7302
2004	1268491211.09849
2005	1223531631.3892
2006	1284495225.44694
2007	1318229297.88654
2008	1357030714.71256
2009	1390233115.56518
2010	1416951442.93863
2011	1427571198.4526
2012	1457024443.20292
2013	1525613952.10299
2014	1552965674.7198
2015	1553780569.10245
2016	1558721802.15821
2017	1582251873.30604
2018	1592597046.72111