Year	constant 2010 US$
1960	17734.567327177
1961	18673.8347398528
1962	19608.7392961232
1963	20608.9997659686
1964	21688.3316677513
1965	22863.6476942442
1966	23860.6272862576
1967	25081.9423021765
1968	26161.008342765
1969	27535.28274148
1970	25195.9995103593
1971	24941.4055350112
1972	23530.9465904697
1973	24802.55288824
1974	20245.2212608171
1975	16903.5049908778
1976	17410.1139248833
1977	18599.8151193458
1978	20775.8134693927
1979	25633.1856605735
1980	26700.9449444996
1981	23704.4291199575
1982	24734.3299140046
1983	25066.2102707334
1984	28016.0727071592
1985	28786.2162218705
1986	28759.2828141152
1987	29099.6957785383
1988	29268.9012614323
1989	30706.5571244708
1990	29686.8978383227
1991	27923.9716261566
1992	26348.8455603457
1993	25938.5355504724
1994	26291.9793474048
1995	27018.3449634376
1996	27783.2570775761
1997	28022.6792280982
1998	29017.2910405495
1999	30723.9752444579
2000	31570.5281698484
2001	31910.5095551311
2002	32236.4487923714
2003	31272.8381153798
2004	30978.5823209877
2005	31442.2788734593
2006	31632.4534870083
2007	31485.4937392897
2008	30190.7510358741
2009	28440.0722223017
2010	28443.4076553352
2011	28248.8497757498
2012	28799.8676832611
2013	28401.6973400279
2014	28094.535221754
2015	28117.0558990781
2016	27369.5564317144
2017	27484.3791916835