Year	constant 2010 US$
1971	347850817.157075
1972	329755894.333778
1973	361898190.163166
1974	361898190.163166
1975	345946079.586663
1976	337374816.583553
1977	273328383.69677
1978	317375184.221715
1979	304280180.00083
1980	330553471.129936
1981	332136837.320695
1982	292137558.581084
1983	269995057.908712
1984	327136918.718284
1985	323803663.009903
1986	382373985.893704
1987	347612756.496628
1988	328565464.888125
1989	391183351.605067
1990	382028394.977917
1991	410263104.11964
1992	335110612.321444
1993	311422476.356041
1994	325711778.420712
1995	319331262.162996
1996	363345321.463167
1997	370031483.221169
1998	369458385.644188
1999	401895857.070222
2000	405028797.031821
2001	397751120.757901
2002	411206376.56286
2003	446078443.975998
2004	388679460.834021
2005	466736699.151793
2006	449996360.407953
2007	436094136.427448
2008	475147283.473045
2009	514184031.874384
2010	450811779.489701
2011	476845468.205481
2012	537833511.890331
2013	568507386.214055
2014	525963458.363652
2015	544228506.609174
2016	504271163.547872
2017	482081415.157727
2018	511195049.583875