Year	constant 2010 US$
1970	2393.93703678538
1971	2301.8092038506
1972	2540.74651156709
1973	3027.67126987254
1974	4336.13389075522
1975	4503.14543323727
1976	3249.96881796966
1977	3054.18476490993
1978	3040.79865777579
1979	2649.75416759771
1980	2181.00199801528
1981	2080.72744703445
1982	2194.41188582209
1983	2147.02456125756
1984	2214.64367512004
1985	2021.31090370244
1986	1958.12091034833
1987	1732.52629760093
1988	1841.07196486317
1989	1734.89145092919
1990	1683.0576618888
1991	1653.54956739876
1992	1644.09309007685
1993	1637.58192752684
1994	1645.08845348239
1995	1622.80060893809
1996	1625.62526434188
1997	1626.25473875117
1998	1703.8060075498
1999	1648.96379800244
2000	1722.46241840075
2001	1668.40801592887
2002	1702.72019347007
2003	1706.96806630926
2004	1648.28087232712
2005	1695.6838253286
2006	1658.59507721265
2007	1654.05592684939
2008	1582.82972456681
2009	1561.24762121981
2010	1516.81186907787
2011	1514.4979214378
2012	1561.40029843359
2013	1604.2849703894
2014	1571.2303626498
2015	1710.65641002456
2016	1772.93279639374
2017	1753.29559989529
2018	1762.30586135033