Year	constant 2010 US$
1988	176321965054.114
1989	177900551058.758
1990	178783202891.285
1991	178820573608.299
1992	172772678700.253
1993	171510199838.562
1994	171857937134.997
1995	179188643943.32
1996	188069924954.006
1997	194606655085.493
1998	200922189646.753
1999	207700604974.481
2000	213214906623.841
2001	223646105642.172
2002	231890680253.281
2003	242463008591.567
2004	257593079169.343
2005	274701973408.412
2006	290153955186.373
2007	308788109996.628
2008	327388326019.499
2009	344553329589.239
2010	368434174244.395
2011	381249681782.119
2012	393796951299.035
2013	417897836639.316
2014	442256289520.82
2015	454968618641.972
2016	468955745704.061
2017	492205827028.133
2018	516561745933.294