Year	current US$
1960	16459999.980404979
1961	123899999.92586672
1962	131800000.68619846
1963	128939999.65302646
1964	107760000.09663403
1965	100790003.43754888
1966	115310000.3246218
1967	84469999.39158562
1968	72890001.4124811
1969	71419999.49887393
1970	52009999.595582485
1971	20669999.903067954
1972	33140000.87231402
1973	35070000.430569075
1974	10070000.38772821
1975	106590000.53256753
1976	5460000.013932588
1977	6060000.030323845
1978	-569999.8550117165
1979	-34199999.690055825
1980	-13240000.355988732
1981	-4519999.900832772
1982	-3999999.5753169097
1983	6480000.341311075
1984	9710000.012069933
1985	46699999.70123168
1986	430001.0371953695
1987	25719999.19973314
1988	48470001.07727943
1989	63990001.28917403
1990	103649998.19360672
1991	118110001.23806298
1992	130960001.93990774
1993	176710001.81883568
1994	149149999.60735422
1995	155369998.1663377
1996	193069998.1283397
1997	124999997.71267176
1998	101180001.42462558
1999	67900000.67278749
2000	46430001.983419076
2001	47579999.355599225
2002	-6650000.760331743
2003	71979999.79741877
2004	39459999.32847914
2005	115190001.28097832
2006	91280001.28269199
2007	95060000.48853455
2008	93690001.104027
2009	70800001.42939396
2010	173649995.57100222
2011	152460000.2355874
2012	112810000.45500699
2013	65209999.388083786
2014	231280007.8187136
2015	39050000.086426735
2016	165059997.64241248
2017	52899998.79710374