Year	constant 2015 US$
1970	7436.069622208744
1971	7746.59633333859
1972	8072.959810677068
1973	8434.901274942058
1974	8566.701226537758
1975	8713.652921838959
1976	9085.328154939434
1977	9325.732586241153
1978	9549.388107783341
1979	9855.98934207757
1980	10012.236074116774
1981	10019.960365495152
1982	10066.783686140867
1983	10125.057674629115
1984	10242.310998806444
1985	10441.10752752465
1986	10791.535173633558
1987	11140.169320163439
1988	11480.207729056221
1989	11839.878904559511
1990	12162.332430920545
1991	12369.0720432332
1992	12564.704779650592
1993	12429.870271532625
1994	12611.871103742202
1995	12820.400519060204
1996	13096.553195497365
1997	13339.694947049235
1998	13755.623276698203
1999	14187.703245791265
2000	14588.321959963327
2001	14847.142340888618
2002	14975.896587070976
2003	15130.67950148802
2004	15390.162800273702
2005	15672.331466915655
2006	15981.45516728075
2007	16280.356181772542
2008	16330.249171351918
2009	16109.047532856875
2010	16240.395983243872
2011	16329.579806412004
2012	16172.03125437832
2013	16036.187282026429
2014	16168.85770950605
2015	16474.145173429377
2016	16800.026450983944
2017	17145.777323904487
2018	17435.931286456926
2019	17687.715394994415
2020	16417.08240772028
2021	17200.143871901546
2022	17891.300479037145
2023	17866.476577400183