Year	constant 2015 US$
1960	13502.265919441425
1961	13231.868560141429
1962	14068.889263707273
1963	15241.616882595554
1964	16452.673906386815
1965	17349.886335995674
1966	18551.28341951544
1967	18024.311103374712
1968	16801.90466143877
1969	17044.287036868263
1970	18219.703299335746
1971	20433.433342723943
1972	21380.411867938245
1973	22493.542715221934
1974	23457.57107690439
1975	23309.12671117112
1976	24454.198609718984
1977	26414.247439237235
1978	27785.789997343134
1979	28852.63828649113
1980	30189.68900903049
1981	31120.296519646163
1982	31368.711880127685
1983	30290.197654915595
1984	31207.21631686765
1985	31981.914530743317
1986	33739.276129427046
1987	36223.55642970171
1988	35628.63963250073
1989	35281.082091783275
1990	35417.14909665556
1991	34930.72760577153
1992	33330.7146821937
1993	33426.874442295964
1994	34334.28720646459
1995	34188.35058766652
1996	35557.27725098603
1997	37302.6680254519
1998	39622.6069816837
1999	40725.886035874966
2000	42174.665058469574
2001	43288.07630463349
2002	43143.460579701255
2003	43763.77561211323
2004	46766.0168708212
2005	48850.76586349238
2006	50731.69068817124
2007	53646.36902027589
2008	53821.47082221004
2009	49527.39882809293
2010	48193.70140410131
2011	48933.54566143469
2012	49191.574417162024
2013	50946.81626253389
2014	51233.24404680405
2015	52951.68151108975
2016	55513.6423015865
2017	56501.457678879284
2018	57697.804423742724
2019	57493.4195335925
2020	52641.72348288027
2021	54452.09696752822
2022	57816.36165760042
2023	58393.178878225925