Year	current US$
1970	10330000.07271766
1971	15780000.16510487
1972	7129999.946802858
1973	20829999.990761288
1974	34629999.60780142
1975	38900000.184774406
1976	30290000.02145765
1977	23760000.117123142
1978	49190000.3552437
1979	38059999.518096425
1980	55879999.935627
1981	50790000.74602669
1982	50529999.31573867
1983	71750000.089407
1984	96259999.63283539
1985	126760001.27196312
1986	80600001.450628
1987	60429999.66070054
1988	95009999.18580051
1989	83909999.66859813
1990	133330000.5197524
1991	189909997.04599375
1992	159160003.36408612
1993	179130002.88605684
1994	63870000.5132705
1995	142030000.1278519
1996	71579998.82102016
1997	68530000.73693699
1998	43200000.01788139
1999	57160000.7414818
2000	37690000.32171608
2001	36030000.060796745
2002	49299999.59282576
2003	54049999.31156634
2004	45579999.68528749
2005	73950000.28610238
2006	54920000.37431718
2007	53169999.688863754
2008	76770000.20444395
2009	52569999.82893468
2010	74189998.12752008
2011	45830000.40799378
2012	92157707.51237872
2013	62382828.1098977
2014	69741693.82825492
2015	45355913.04674741
2016	39480325.54611559
2017	57170989.76299172
2018	59173477.58263351
2019	57280164.690688215