Year	constant 2010 US$
1980	195.462636477263
1981	198.6229741716
1982	179.413881197141
1983	147.320654221619
1984	134.500344297449
1985	133.224051318307
1986	129.390910071875
1987	145.162138089435
1988	160.617088771585
1989	166.706151875987
1990	170.381257289373
1991	173.768440478051
1992	155.252400744642
1993	163.059371405035
1994	166.242626239943
1995	166.72352205447
1996	208.411449736732
1997	225.873287232681
1998	245.807071881627
1999	260.607609261588
2000	252.909361910243
2001	275.666379593544
2002	269.271532270147
2003	304.116565434554
2004	313.658821611525
2005	330.320677177976
2006	341.789694107916
2007	361.68169751312
2008	378.577385644266
2009	404.633624760254
2010	417.026644967593
2011	443.0148000405
2012	466.248372496553
2013	486.391865363132
2014	503.785104010632
2015	517.318624467967
2016	519.473502792774
2017	520.111828333595
2018	526.792195483576