Year	constant 2015 US$
1966	3971.2677052462554
1967	3993.9215551815164
1968	4172.931489016961
1969	4351.754088021502
1970	4812.5620584993485
1971	4860.137548279877
1972	5648.070231773584
1973	5255.862776553141
1974	4958.23601086287
1975	4875.879405214007
1976	4490.313435809001
1977	4319.527120364783
1978	4264.172199701577
1979	4166.002231032116
1980	3875.3291534817863
1981	3920.501907618233
1982	3941.6838101556646
1983	3957.24766052764
1984	3842.327614384009
1985	3683.772141600582
1986	3714.4854510963055
1987	3971.1493385609683
1988	4096.43123206146
1989	4355.948187991244
1990	4503.504137282672
1991	4682.562137037765
1992	4729.603836911946
1993	5123.461486034436
1994	5141.813875690716
1995	5209.81593198621
1996	5155.564239084874
1997	5052.760559006082
1998	4893.406598275438
1999	4907.146700197722
2000	4920.070203645918
2001	4961.171877835402
2002	5035.6351824006215
2003	5195.085975649208
2004	5238.1738134743455
2005	5259.64416839663
2006	5386.377750957474
2007	5440.124846342383
2008	5375.761629109261
2009	5121.338477600292
2010	5025.493514871064
2011	5089.605217261296
2012	5033.358616029319
2013	5035.128625219176
2014	5049.080415465381
2015	5077.550969156158
2016	5132.226821363363
2017	5172.916053614808
2018	5264.196452158399
2019	5307.510344344676
2020	4769.693594176959
2021	4976.359709427807
2022	5236.790244195761
2023	5355.474824839501