Year	constant 2010 US$
1970	12519.5636717488
1971	12857.4681906604
1972	13580.7248586499
1973	14318.8632757988
1974	14825.9300971304
1975	15169.1167156222
1976	15738.5208482924
1977	15987.7216352094
1978	16301.606994943
1979	16510.4843582422
1980	16577.2147405588
1981	16570.0481301921
1982	15954.6034486825
1983	16192.761772548
1984	16656.471503393
1985	17313.7918857902
1986	17729.0654024043
1987	18175.1779560772
1988	18681.9988994638
1989	18976.91293724
1990	18950.6590498961
1991	18509.6781215345
1992	18575.1272967316
1993	18712.1129797154
1994	19042.6252835838
1995	19267.9167315272
1996	19633.2716139357
1997	20390.5686746948
1998	20777.6001653293
1999	21422.5989397699
2000	22085.6232013859
2001	22379.4206260669
2002	23022.0770696112
2003	23441.8902877077
2004	23930.534252667
2005	24637.0277508697
2006	25410.2762641037
2007	26270.5118228969
2008	26757.267973911
2009	26467.6509898766
2010	27112.3225278178
2011	27465.4546438163
2012	27689.6900858024
2013	28116.2153074799
2014	28557.0216453173
2015	28995.0739301946
2016	29311.5646217377
2017	29979.9375222947
2018	30168.0229439743