Year	constant 2015 US$
1970	15088.315275486992
1971	15462.828348290088
1972	16241.587095121447
1973	16899.112408448655
1974	16666.50763998725
1975	16888.604842253597
1976	17649.38915241979
1977	18189.32688218383
1978	18767.842755185575
1979	19004.0062777779
1980	18785.569235520863
1981	18852.792619010062
1982	18886.83351775534
1983	19730.418476677332
1984	20568.37763990732
1985	21437.960738668622
1986	22105.75037823745
1987	22649.1567340639
1988	23372.156693349898
1989	23815.294724112748
1990	24002.586238487984
1991	23708.05594880817
1992	24213.159061397306
1993	24708.069795928986
1994	25340.16996690389
1995	25771.577353210792
1996	26352.28687841699
1997	27041.743686033922
1998	28112.69615598165
1999	29271.490958678347
2000	30393.462796087795
2001	30835.10450047395
2002	31349.92128866602
2003	32055.69149917546
2004	32943.4909204741
2005	33804.194916144625
2006	34475.29720077454
2007	35021.11026816319
2008	34801.99055841134
2009	34070.45995216702
2010	34461.338721961
2011	34798.792551978644
2012	35017.06034468973
2013	35390.09701007937
2014	36110.078022375135
2015	37027.08055721186
2016	37638.377176829905
2017	38391.71335219067
2018	39197.70479356131
2019	39748.28955488421
2020	38266.688013737985
2021	41317.92150898152
2022	42212.52040986474