Year	constant 2015 US$
1960	3069.919827414379
1961	3252.8063380315375
1962	3286.6089648047623
1963	3354.5925596911857
1964	3109.9448199259778
1965	3154.0878510550056
1966	3295.140789179618
1967	3514.93691135859
1968	3801.9297522016063
1969	4057.184890183306
1970	4498.184349380712
1971	4939.05446712433
1972	5291.545392510006
1973	5615.439229014669
1974	5903.800178209715
1975	6005.537610840205
1976	6237.396126611987
1977	6472.872392545403
1978	6814.877607004749
1979	7176.0301197592
1980	7486.067199176569
1981	7480.806243777334
1982	7447.695224879566
1983	7769.799270720318
1984	8069.987037294906
1985	8052.746335187516
1986	8377.237320137812
1987	9095.693536026753
1988	9880.598977861373
1989	10390.780423935703
1990	10733.436874667095
1991	11071.645246495635
1992	11377.205309818386
1993	12397.016685616878
1994	12890.991476576797
1995	12988.231231127655
1996	13291.408860255706
1997	13590.558136121166
1998	12882.965183236342
1999	14014.54852995961
2000	15644.986671757595
2001	16457.040442766225
2002	16869.921316262036
2003	17340.202846189575
2004	18024.385546844547
2005	18326.774671155734
2006	18541.021790990362
2007	19030.27781443151
2008	18815.666610356566
2009	18206.325046184727
2010	18664.78919877874
2011	19003.674477025193
2012	19233.546552365267
2013	19457.38776472238
2014	19898.753358476606
2015	20676.839451364634
2016	21067.765976635164
2017	21714.374750305185
2018	22550.187546958045
2019	22894.66016459602
2020	19905.8215230741
2021	22436.483884355162
2022	23495.846263299576
2023	23232.472108835005