Year	current US$
1970	17919999.705627557
1971	23970000.31173226
1972	7840000.104159133
1973	16090000.14886263
1974	10509999.549016314
1975	10320000.328123566
1976	8199999.963864688
1977	9040000.358596444
1978	11990000.0821799
1979	15770000.251010058
1980	38560000.49971048
1981	77979999.80300662
1982	126880000.83900987
1983	178509999.35716397
1984	307619999.37146956
1985	331249996.8763441
1986	647569988.2954366
1987	949930004.6227877
1988	1082690000.006929
1989	668569989.5769353
1990	837090010.0171561
1991	412789998.29292333
1992	513580002.6096403
1993	385359996.04128313
1994	274960001.09799206
1995	264630002.623424
1996	171150001.18128946
1997	209939999.35686588
1998	377379993.94722295
1999	153030000.68105763
2000	181009996.9618023
2001	147720000.8276851
2002	708959993.7666206
2003	590100009.7319483
2004	196699998.89284375
2005	231600000.74282295
2006	205759998.51524788
2007	153310002.45548788
2008	243049996.6517091
2009	154270001.3406574
2010	135059999.28154057
2011	729800014.5815318
2012	74040000.82239512
2013	56179999.917745635
2014	109049999.34136866
2015	119349999.94561072
2016	101130000.38079916
2017	136829999.21403825
2018	173930000.83602974
2019	162460001.09426674