Year	constant 2010 US$
1977	192329541.059681
1978	212592892.610305
1979	173562356.524153
1980	196790523.053486
1981	218101620.16359
1982	227104164.742335
1983	232909669.467861
1984	242684065.728389
1985	246132444.231504
1986	263542269.465431
1987	280165359.177081
1988	302064829.117075
1989	301487472.956249
1990	317824029.550636
1991	322103441.249831
1992	328642095.419358
1993	335747775.023338
1994	335861932.61591
1995	346039117.138171
1996	356783368.441353
1997	364580154.224195
1998	378338852.322604
1999	379681123.994189
2000	388563792.013072
2001	388319765.170857
2002	377334670.70334
2003	401308219.954518
2004	413550908.531293
2005	416264766.518843
2006	435657540.804062
2007	463338172.84857
2008	496331288.267493
2009	490525417.514535
2010	493824413.333333
2011	492719819.666115
2012	487502986.283718
2013	484540468.319876
2014	505806446.046434
2015	492905837.365696
2016	505337173.34281
2017	457176471.244843
2018	459612036.065326