Year	constant 2015 US$
1961	2189.483219190847
1962	2246.8752902922274
1963	2424.884468330297
1964	2593.062575314745
1965	2826.9626380488844
1966	2935.3294505610356
1967	3080.9018966525337
1968	3380.0800132735017
1969	3644.8313520360157
1970	4164.4499327229405
1971	4481.202730433236
1972	5027.96846519313
1973	5468.096355552434
1974	5795.782093379768
1975	5554.3413606658605
1976	6180.952410896631
1977	6230.079577607687
1978	5915.999437161349
1979	6086.852976004154
1980	5951.281011280837
1981	5733.901114789077
1982	5363.404423331187
1983	5088.736650914627
1984	4914.906377266466
1985	4750.313823050226
1986	4650.777080118826
1987	4498.697236305576
1988	4507.684352469042
1989	4536.945139558066
1990	4831.110081765388
1991	4866.449385992032
1992	5018.72136100452
1993	5005.343811379045
1994	5040.94191251712
1995	5078.644497686885
1996	5217.937463774428
1997	5317.054096478133
1998	5435.716976460933
1999	5430.839878058746
2000	5679.652131844207
2001	5649.43175556688
2002	5627.9940720094755
2003	5803.7733617302
2004	6135.636494219936
2005	6306.384621154435
2006	6527.731547033769
2007	6703.933159580801
2008	6845.358340827889
2009	6726.206877179085
2010	6912.715263954522
2011	7029.632014754893
2012	7164.128526365736
2013	7169.684319304005
2014	7221.223002211134
2015	7266.659229289896
2016	7441.383500860594
2017	7454.711805966092
2018	7489.141211074978
2019	7461.952086711731
2020	7060.794573191428
2021	7359.098907677905
2022	7670.0406039016725
2023	7689.533639735139