Year	constant 2015 US$
1960	12489.359262060183
1961	12926.309029914173
1962	13405.540685232894
1963	13645.296879298781
1964	14434.584398872148
1965	15062.496121170467
1966	15357.377855856874
1967	15236.835510220315
1968	16029.134058243302
1969	17082.19416471144
1970	17894.29668550248
1971	18421.04218147607
1972	19121.4978922895
1973	19972.02540723462
1974	20141.93947531943
1975	20041.947992263897
1976	21124.255695091233
1977	21880.807628135564
1978	22558.714790358026
1979	23484.599191830675
1980	23766.10765156298
1981	23855.525856973836
1982	23783.945487006444
1983	24221.34037474346
1984	24991.33368351117
1985	25630.332997633614
1986	26204.589578531355
1987	26531.229705288002
1988	27407.520066196255
1989	28256.10622097309
1990	29485.709974488087
1991	30766.928957772732
1992	31121.070565007587
1993	30615.140211743532
1994	31238.879059662766
1995	31628.159813094277
1996	31790.866859605634
1997	32313.297070434404
1998	32959.07356914177
1999	33559.399373749926
2000	34490.07576886186
2001	35011.06845750298
2002	34883.058073544526
2003	34619.664067018464
2004	35034.08060861815
2005	35310.4704669272
2006	36699.44678103599
2007	37842.357791356335
2008	38278.31300825307
2009	36190.392886069814
2010	37760.91362839962
2011	39977.34170953571
2012	40069.353956074236
2013	40135.01583198371
2014	40851.16173048549
2015	41103.25643637683
2016	41682.03224335112
2017	42639.55440872855
2018	42928.741236801245
2019	43292.68389173847
2020	41601.97315635165
2021	42900.02251873831
2022	43361.177120432076
2023	42878.81183857641