Year	current US$
1970	28460079.3981317
1971	29947790.3284604
1972	30501359.067087
1973	35667923.9083938
1974	40599120.9665066
1975	47011241.3870901
1976	53022932.2174695
1977	65230606.4591582
1978	90845566.6334113
1979	114773815.727723
1980	159142295.791144
1981	197270711.157546
1982	257681260.758492
1983	257206023.507409
1984	279119762.299244
1985	354266523.000363
1986	415624288.017188
1987	472026013.029902
1988	465595008.909852
1989	322706610.753611
1990	290424191.294299
1991	370657699.195408
1992	363746154.501712
1993	377910473.261054
1994	424052117.274498
1995	465491315.387034
1996	507649076.942129
1997	583251179.495225
1998	653851963.606519
1999	702030318.248344
2000	671176889.245526
2001	710363673.750123
2002	738455721.178568
2003	722526707.724639
2004	798727755.72737
2005	941667804.028848
2006	1018734093.09381
2007	1197275207.19379
2008	1658116211.84223
2009	1893401876.00575
2010	1982273431.4072
2011	2158236604.28181
2012	2186145895.12242
2013	2291472177.22307
2014	2437357048.03514
2015	2567440597.1291
2016	2953593533.26765
2017	2396975918.68059
2018	2375272877.26281
2019	2471036426.07441
2020	2144878081.6034
2021	1929170376.33204