Year	current US$
1970	272.6983388765783
1971	293.61383167292166
1972	354.02994793737565
1973	455.3715834387919
1974	508.89030586217865
1975	548.1388181580674
1976	590.5170261406909
1977	691.5677900740802
1978	863.6767403916057
1979	903.3978085167014
1980	946.6510451712289
1981	1028.9887593410451
1982	992.483037109749
1983	1043.598168914656
1984	1101.5912731961273
1985	1146.178347115305
1986	1476.9441343939118
1987	1688.8753597404382
1988	2016.841532523666
1989	2049.9536063993255
1990	2091.820019735306
1991	2320.123743253286
1992	2475.981232205387
1993	2719.858878175709
1994	3050.634366032986
1995	3438.936094037555
1996	3277.8736739225983
1997	3069.726465469162
1998	2677.0776007965387
1999	2964.104984926032
2000	3181.045180037571
2001	2931.8251801235756
2002	2962.2701894425213
2003	3254.56625519411
2004	3626.4640691475365
2005	3823.3272101966254
2006	4027.692564759446
2007	4477.156048073687
2008	5047.7244370765975
2009	5194.026784605319
2010	5998.414367412986
2011	6814.130145655127
2012	7337.40025138667
2013	7317.249695640182
2014	7506.805634859026
2015	7418.341489994214
2016	7648.358153763388
2017	8115.80580740524
2018	8660.91338263201
2019	8759.26190416487
2020	8619.59659638036
2021	9684.281762327446