Year	constant 2010 US$
1980	314.640839475862
1981	317.775303623938
1982	334.995299012557
1983	325.566696897681
1984	312.965208905917
1985	317.41885871471
1986	334.455875940937
1987	323.119297060499
1988	332.756942573548
1989	325.196257632778
1990	316.141907201432
1991	331.061504736502
1992	316.734897277311
1993	318.354068952963
1994	286.464985118573
1995	293.365693154926
1996	317.875381713431
1997	327.164474213602
1998	346.865715085572
1999	373.647092324196
2000	372.221130931751
2001	386.567904176106
2002	395.769894196425
2003	414.292039421444
2004	415.489233939856
2005	430.05917567397
2006	437.178027170309
2007	439.278218170886
2008	450.603249288669
2009	446.577019465663
2010	454.632897124803
2011	464.902442209063
2012	501.35016169937
2013	511.20745092893
2014	511.870778636105
2015	495.988068165486
2016	503.008060740388
2017	518.332641415742