Year	constant 2015 US$
1960	18674.869206108702
1961	18796.48598185762
1962	19651.24198467944
1963	20227.8319858087
1964	21109.749080260444
1965	22168.784293425968
1966	23328.55809515056
1967	23648.462285690817
1968	24526.666842003287
1969	25069.234461233835
1970	24880.847359937346
1971	25351.28439054434
1972	26402.24710765228
1973	27643.458129516937
1974	27319.801502114526
1975	27024.96971035849
1976	28213.951143302573
1977	29192.22776749423
1978	30439.699620423144
1979	31076.409311515108
1980	30756.14179844398
1981	31244.331034043607
1982	30345.0945987142
1983	31391.584959836335
1984	33333.714265886
1985	34431.12564744955
1986	35254.9246445252
1987	36151.39231728447
1988	37313.767499677524
1989	38245.86650323545
1990	38461.46632638484
1991	37850.97233361019
1992	38572.56723691572
1993	39120.62186468398
1994	40219.63011228617
1995	40817.01397313153
1996	41805.19927166542
1997	43145.47110754301
1998	44552.453508865154
1999	46179.774047280654
2000	47577.96307482275
2001	47590.20621397851
2002	47992.633486052735
2003	48872.8422434126
2004	50256.260527430204
2005	51517.4642449549
2006	52436.13008816254
2007	52981.809767271705
2008	52571.24880011648
2009	50741.68384357146
2010	51678.984591856104
2011	52157.155541141045
2012	52919.074831089005
2013	53655.661662209175
2014	54606.95020443112
2015	55701.81244346794
2016	56248.67139646505
2017	57260.56823025886
2018	58585.17018883312
2019	59670.48231290855
2020	57649.74418786195
2021	60850.413640756604
2022	61794.6930115336
2023	62823.20098449206