Year	constant 2010 US$
1970	17738.0080029721
1971	17982.7965966406
1972	18550.8454993102
1973	19692.7046349413
1974	20534.3997847927
1975	20006.3671820257
1976	21308.7030246779
1977	21784.9151218002
1978	22417.8257834197
1979	23747.7229637782
1980	24529.8452582654
1981	24550.3500202391
1982	24611.3707657797
1983	24913.2222790115
1984	25710.7541477163
1985	26391.7087548355
1986	27069.013060796
1987	27980.2246393784
1988	29152.9042517967
1989	30065.9959544546
1990	30430.8229921364
1991	30822.5098305329
1992	31010.9391140461
1993	30802.0948831727
1994	31409.5890477704
1995	32424.5735017826
1996	32914.6603605705
1997	33677.1576279329
1998	34178.1392649062
1999	34832.6885462255
2000	36041.0314148976
2001	36686.9407138709
2002	36670.6183495842
2003	36548.8097605013
2004	37007.2426713784
2005	37295.6602975247
2006	38019.3711446771
2007	38267.2124221043
2008	37242.9885640211
2009	35341.505833562
2010	35777.8985276519
2011	35899.9550967618
2012	34837.0798694028
2013	33829.9758113651
2014	33617.2413622282
2015	33726.2068488694
2016	34484.2388877025
2017	35197.2804199828
2018	35723.9926136261