Year	constant 2015 US$
1960	10658.296268685042
1961	10679.592627126733
1962	10683.481312739576
1963	11052.048069558105
1964	11600.988954008593
1965	11944.465365185186
1966	12017.096772071205
1967	12473.520666009761
1968	12863.71701634096
1969	13267.352663775528
1970	13804.793629155334
1971	13864.199559116942
1972	14101.964794951016
1973	14540.425182745077
1974	15068.74826743666
1975	15605.269795123912
1976	15568.66939848296
1977	16211.265825828692
1978	16338.065768650604
1979	16405.405678667456
1980	16496.909124157322
1981	16770.34283607396
1982	17399.999159325027
1983	17576.46729471399
1984	17553.58166394541
1985	17389.57076760469
1986	17988.572756225716
1987	18075.426793192877
1988	18351.58017521463
1989	18884.037260895755
1990	19411.82284538222
1991	19356.882902872858
1992	19594.719199389267
1993	19791.038747852373
1994	20023.714088876935
1995	20674.360736377836
1996	21114.779589225927
1997	21485.00424011896
1998	22357.7455986613
1999	23344.67999535235
2000	24049.90887842789
2001	24530.96271292843
2002	24974.533247771567
2003	25746.56258524082
2004	26825.81060596217
2005	27704.383276643817
2006	28231.81551397623
2007	29185.377553704137
2008	29980.502039258387
2009	29457.924523937974
2010	30020.673071359917
2011	30806.209497500673
2012	31145.084330044545
2013	31199.89689047838
2014	31439.911676892465
2015	31806.364695597764
2016	32131.10320266038
2017	32374.290369720788
2018	32770.43041606608
2019	32810.56801903266
2020	31331.60818816566
2021	31572.488831038503
2022	32506.710769682075
2023	33362.89492370549