Year	constant 2015 US$
1960	11470.717077169404
1961	11833.85641759774
1962	12344.418742739828
1963	12812.889785649195
1964	13475.017319931969
1965	14058.941667207653
1966	14680.954279514597
1967	15086.79968316533
1968	15819.42573221961
1969	16547.921157703688
1970	16837.96016394414
1971	17272.309090551233
1972	18019.547383727153
1973	18947.523394986627
1974	18958.566204092433
1975	18800.048014473785
1976	19554.352657368123
1977	20154.033126898565
1978	20876.41088827657
1979	21518.888592039337
1980	21603.993773342518
1981	21878.810520204715
1982	21789.142781932947
1983	22350.40876614116
1984	23300.705842596504
1985	24044.592817548637
1986	24676.41772931395
1987	25405.795712383417
1988	26438.956037375043
1989	27275.481844858514
1990	27835.479066148317
1991	27915.182365145436
1992	28249.1644666556
1993	28392.32930915913
1994	29116.222163903123
1995	29742.678245535466
1996	30444.157426306927
1997	31323.25729127746
1998	32055.617308713965
1999	33028.70758539046
2000	34190.31120013652
2001	34549.043424862466
2002	34902.65108639249
2003	35431.07288256966
2004	36381.55056580117
2005	37201.503449848744
2006	38082.79971633199
2007	38823.97150691985
2008	38728.617030615846
2009	37224.444687198134
2010	38130.89686525852
2011	38660.660238459095
2012	38983.60205041955
2013	39399.37147662351
2014	40009.80477347844
2015	40717.09895106625
2016	41261.912509104186
2017	42118.25471236516
2018	42913.44849958176
2019	43546.43211121679
2020	41596.77376651922
2021	43896.77454570479
2022	45048.779838361996
2023	45600.105793420385