Year	current US$
1970	2620000.040158628
1971	2910000.005736949
1972	3589999.966323378
1973	4589999.964460731
1974	6299999.915063377
1975	10789999.851956958
1976	12230000.015348202
1977	19979999.92221594
1978	22879999.95797872
1979	31729999.754577886
1980	39069999.99657274
1981	43799999.48292971
1982	43029999.96393922
1983	50420000.67606573
1984	52130000.40501359
1985	68190000.1317263
1986	77439999.24883243
1987	86899999.54029916
1988	99960000.6118417
1989	124050001.71810378
1990	136140000.76055527
1991	153099999.6960163
1992	215940000.05722055
1993	223579998.01635733
1994	251119998.57425684
1995	232040000.3194811
1996	207799998.90737244
1997	94840000.73745851
1998	85299999.73252417
1999	99259998.97345896
2000	101679999.44090839
2001	109859998.52418901
2002	100729999.57203865
2003	111860000.22292136
2004	117550000.36954883
2005	145910000.14543527
2006	175190001.54733658
2007	266150000.8106231
2008	289609997.9877472
2009	264999998.7483024
2010	281839999.139309
2011	264640002.8467178
2012	236725946.36678693
2013	266158476.7699242
2014	290340510.6663704
2015	307458766.9372559
2016	305509131.9680214
2017	315162052.45256436
2018	311013296.7829705
2019	1552835012.0782847