Year	constant 2010 US$
1970	10568.8472850544
1971	11228.6620051333
1972	11842.3555937822
1973	12409.561887814
1974	12759.1347456162
1975	13208.4581174523
1976	13833.122571791
1977	14716.9247681537
1978	14477.6395787282
1979	15190.7272705254
1980	15573.5039739381
1981	15731.9570066947
1982	16023.0025119535
1983	16921.0551242693
1984	16562.0849451461
1985	16854.0892051597
1986	17212.7513084272
1987	17617.7700372112
1988	18016.4616929449
1989	18579.0312479736
1990	19218.8157187611
1991	19597.7691571879
1992	20057.6688733284
1993	19914.0190035358
1994	20242.8075534995
1995	20384.1290426018
1996	20954.894485699
1997	21019.0913905002
1998	21606.0320140924
1999	22085.3540388728
2000	22718.9319350347
2001	22922.0306301798
2002	22965.0916422535
2003	23251.7943525108
2004	23644.2952204186
2005	24011.7751870117
2006	24393.2015932328
2007	24582.6225024677
2008	24737.691941164
2009	24882.8560966335
2010	25069.9490859479
2011	25321.6613126176
2012	25338.0327990375
2013	25169.2286266923
2014	25049.1247260294
2015	24872.7959193577
2016	24947.0230148852
2017	25131.0135453867
2018	25402.0239905975