Year	constant 2015 US$
1960	3288.607468379469
1961	3389.6152144060356
1962	3454.392824391083
1963	3584.3775536804046
1964	3605.6250495117647
1965	3571.1406726068967
1966	3900.117547190186
1967	3969.815075459102
1968	4040.8199344474965
1969	4128.269325276406
1970	4133.49394459911
1971	4448.7338339364205
1972	4333.315569392342
1973	4050.6734954174035
1974	4081.8664152494753
1975	3499.0855646271466
1976	3577.595233184184
1977	3891.8349214966597
1978	4128.367033361924
1979	4409.9476629558785
1980	4693.440822855756
1981	4927.622092098095
1982	4321.8225449470365
1983	4047.017389479619
1984	4153.702849755606
1985	4257.652247962698
1986	4419.177179063461
1987	4631.2976249708145
1988	4892.347179654754
1989	5291.717691461414
1990	5380.317900887819
1991	5706.523410283461
1992	6242.329966482933
1993	6550.913547808298
1994	6777.653159538767
1995	7277.561893566493
1996	7666.98478435409
1997	8125.955528436336
1998	8359.874902255926
1999	8238.300951988122
2000	8549.079072775014
2001	8720.91013452207
2002	8902.837974770247
2003	9226.150453274642
2004	9744.322438518057
2005	10212.782499868563
2006	10725.05476352925
2007	11169.286780737117
2008	11477.090093020739
2009	11232.82311900148
2010	11770.756580328389
2011	12380.015295874326
2012	13014.582491330448
2013	13316.052295478738
2014	13418.975768239885
2015	13567.357217433244
2016	13642.018092698563
2017	13612.924246061846
2018	13904.115338403422
2019	13743.893041740805
2020	12725.212343005487
2021	14027.306877246217
2022	14235.361627472283
2023	14247.713348023513