Year	constant 2010 US$
1960	612.291467435626
1961	622.21516416063
1962	666.68432806421
1963	708.655413497489
1964	689.278206826914
1965	716.01571554476
1966	693.116976368548
1967	674.44029325177
1968	658.078713093696
1969	604.67581328488
1970	605.923497333328
1971	622.754305280961
1972	574.450032935848
1973	463.501920891206
1974	490.307990603236
1975	463.362755052143
1976	453.376551872462
1977	474.693077921552
1978	523.257241311999
1979	544.649147004968
1980	517.353806712311
1981	505.751143950409
1982	499.390927324155
1983	462.177780313358
1984	373.506524949187
1985	390.908047374795
1986	403.920588179678
1987	392.636052168984
1988	407.519927977516
1989	399.070442008975
1990	381.854301529793
1991	379.037553660192
1992	342.837728921141
1993	336.285058814931
1994	338.001296207254
1995	335.042639709296
1996	334.639350863198
1997	331.976825323189
1998	353.80124808711
1999	339.423096481121
2000	322.777857895134
2001	333.358918780843
2002	331.002152090358
2003	335.923959821968
2004	324.016215702542
2005	326.206894058318
2006	332.450482046928
2007	330.268661100387
2008	348.513183012156
2009	333.094639173344
2010	347.343040654604
2011	341.764755049952
2012	367.646761610744
2013	372.185866840619
2014	384.90065616626
2015	386.304532569044
2016	389.985559100721
2017	393.662099611086
2018	398.520042795364