Year	constant 2015 US$
1960	11960.957511900884
1961	12554.306786503887
1962	12808.088290067122
1963	13252.716740713147
1964	13970.92599189613
1965	14363.510798537287
1966	15067.966169856916
1967	15405.640762128505
1968	16011.27375577598
1969	16957.45932614386
1970	18101.99194773224
1971	18943.181146775474
1972	20002.556110575842
1973	20864.847458327888
1974	21650.486797649766
1975	21629.046302827534
1976	22659.317777419015
1977	23801.267544962444
1978	23770.366243236524
1979	25086.400193857968
1980	25520.740555739958
1981	25419.009647610157
1982	25911.66094000392
1983	26725.190722852705
1984	26740.577241759573
1985	27395.872647990607
1986	28008.554589034415
1987	28370.71788191391
1988	29264.323577825202
1989	30265.1932308117
1990	31340.681292716505
1991	32097.24109367552
1992	32410.539773259956
1993	32313.711872263695
1994	32962.8174189767
1995	33790.484985750394
1996	34537.7395746518
1997	35220.887742625884
1998	36442.28823333842
1999	37664.94327921165
2000	38842.89051958305
2001	39184.80859726363
2002	39636.48261145213
2003	39815.22195330638
2004	40651.22661558113
2005	41281.27075595222
2006	42496.35105168305
2007	43937.71289057435
2008	44440.05588992799
2009	42655.19213048132
2010	43334.50896446905
2011	44451.00019184727
2012	44549.88169823101
2013	44299.378184544636
2014	44245.168739833825
2015	44195.817594774824
2016	44590.25162781637
2017	45281.723399938004
2018	46154.62509565415
2019	46616.359174324236
2020	43343.971895113624
2021	44984.41973669092
2022	46697.85651939127
2023	45851.7248755344