Year	current US$
1970	5360000.031068919
1971	5590000.02220273
1972	5490000.018849963
1973	5460000.0511854915
1974	11140000.114217402
1975	11780000.001192097
1976	7979999.978095287
1977	9359999.97891486
1978	27700000.196695298
1979	32330000.38191677
1980	30000000.14342371
1981	21680000.05930662
1982	34680000.66839162
1983	48759999.6589124
1984	37929999.290034205
1985	33049999.512732036
1986	47159999.53821298
1987	47349999.874830276
1988	43380000.07346276
1989	53970001.45539643
1990	52530000.76487668
1991	55109999.56727032
1992	65980000.674724594
1993	73850000.7502735
1994	84259999.57323077
1995	102870000.80756836
1996	100110000.53770833
1997	61139999.91491435
1998	63439999.65861441
1999	49739999.82699749
2000	45910000.234842256
2001	41199999.50379134
2002	38129999.727010675
2003	41390000.34332278
2004	41980000.43630602
2005	49850000.42058531
2006	42020000.26404862
2007	46550000.22053723
2008	41549999.86290934
2009	44620000.12397764
2010	40780000.269413
2011	40999999.46355821
2012	40992993.26539042
2013	43117016.25585557
2014	52433955.66940311
2015	44669155.04058127
2016	43068124.18624758
2017	45918690.20462037
2018	53494557.73830415
2019	56522999.64427947
2020	53899000.16784665
2021	51909000.575542435
2022	54097000.06246568