Year	constant 2010 US$
1980	659.481794210703
1981	659.418072050074
1982	625.974918181695
1983	607.021341996393
1984	569.985370697349
1985	605.9558713311
1986	564.721734755077
1987	568.282137358741
1988	565.676629717272
1989	542.703199881665
1990	517.174351046068
1991	495.727502535676
1992	646.44450840235
1993	693.920440161349
1994	781.772786774992
1995	885.805529427371
1996	1420.98302290724
1997	3415.62783002195
1998	4060.89771600512
1999	4898.9004916368
2000	5557.96394160947
2001	8714.23171958392
2002	9987.80720382938
2003	10912.8824970404
2004	14423.497197046
2005	16107.1601253669
2006	16575.0822715397
2007	18243.2387488032
2008	20512.9407227592
2009	19848.7072187909
2010	17272.0097706819
2011	17593.1435205546
2012	18236.3058918906
2013	16748.0899969708
2014	16130.336367463
2015	14080.0765773426
2016	12346.2595573481
2017	11331.1527952619
2018	10602.2861568599