Year	constant 2010 US$
1980	540.46237680509
1981	541.005294032862
1982	535.067628338605
1983	532.324614715946
1984	531.411301241822
1985	527.208909262469
1986	531.099808602431
1987	537.845425694653
1988	537.229544257851
1989	535.130671660711
1990	523.046215802386
1991	517.614295780611
1992	504.801228081144
1993	485.965515881912
1994	476.609831599571
1995	492.13358807445
1996	508.584373208371
1997	519.795940484496
1998	527.102422967881
1999	535.1844379721
2000	543.952635240741
2001	558.523877680073
2002	573.540252848422
2003	589.384558598211
2004	614.652679027117
2005	649.587493751305
2006	683.743550249042
2007	724.002779380033
2008	757.99899222794
2009	774.762188970412
2010	804.022644319157
2011	815.149475395361
2012	834.965044559873
2013	862.376629087327
2014	888.247302084645
2015	902.686311997183
2016	914.158741320054
2017	936.21142292139
2018	953.254451610371