Year	constant 2015 US$
1966	2318.3159092311316
1967	2406.298143564112
1968	2592.523153386678
1969	2708.212191136214
1970	3220.363618439741
1971	3416.27274310617
1972	3834.6589805448225
1973	4249.385204166551
1974	4565.772503786234
1975	4350.232648211354
1976	4846.895776034032
1977	5016.203582828379
1978	4892.591641841551
1979	5255.276986150136
1980	5393.701969873731
1981	5247.48100580116
1982	4691.856399722277
1983	4303.078205402014
1984	4224.837372336174
1985	4046.6163198466043
1986	4059.9801702803657
1987	3912.705056790191
1988	4003.5879485136725
1989	4040.272356415994
1990	4289.594071194607
1991	4257.709911486902
1992	4415.275784605611
1993	4410.595466069431
1994	4430.008551381453
1995	4439.951025701761
1996	4534.746200505063
1997	4648.809699668494
1998	4763.720740605604
1999	4743.794977401723
2000	4943.783700285876
2001	4916.366527321932
2002	4841.809908157369
2003	4969.096012841672
2004	5294.690548266024
2005	5456.802883395614
2006	5649.717466300051
2007	5749.822898309245
2008	5909.089930680897
2009	5781.09249176107
2010	5915.223281083421
2011	5996.197313237972
2012	6163.268063911828
2013	6176.533521754775
2014	6184.052192564161
2015	6258.607226529733
2016	6350.531332046109
2017	6315.847499400462
2018	6348.446345147878
2019	6324.089752353362
2020	5879.176985349878
2021	6081.274255071572
2022	6320.536509977996
2023	6263.5566712262835