Year	constant 2010 US$
1981	1078.58155662042
1982	928.213572551712
1983	697.822932529948
1984	721.023784849496
1985	862.967055089911
1986	762.17339267321
1987	700.893144888707
1988	730.344700072531
1989	657.394177955701
1990	793.249994773133
1991	818.996354616068
1992	933.789056451167
1993	835.623575509846
1994	734.744801204944
1995	752.2143122568
1996	880.344029032824
1997	830.864482624645
1998	807.718524766778
1999	720.534884298072
2000	715.145637675951
2001	1111.58060514923
2002	1248.8847824328
2003	1348.70445320381
2004	1317.60212994197
2005	1447.71031343513
2006	1216.93820435268
2007	1595.24978614376
2008	1305.30772632248
2009	1554.21963021752
2010	1539.57712944136
2011	1453.08712129809
2012	1414.72873464025
2013	1667.50102316856
2014	1633.61307857158
2015	1585.88142574625
2016	1482.10617421083
2017	1430.20449369159