Year	current US$
1970	18569999.719038602
1971	23349999.722093333
1972	37590000.58658421
1973	63890001.03622684
1974	75960000.57086354
1975	129350000.91791153
1976	134740001.3655423
1977	165919998.0199338
1978	171980001.86681736
1979	252010006.42776495
1980	264750004.23192963
1981	237859999.16680145
1982	229339993.94625416
1983	216150000.15497205
1984	192900002.69561997
1985	211419997.51329434
1986	335309999.5777012
1987	307819997.9364871
1988	428389997.022226
1989	399120001.7780065
1990	543560006.1099981
1991	618700005.620718
1992	532680000.9608269
1993	462069998.8529087
1994	397370002.0760297
1995	354260003.6635996
1996	432519999.6717275
1997	361470000.0956655
1998	288080000.8922814
1999	297229998.33524233
2000	326980001.78113586
2001	267370001.8823149
2002	294029997.49779713
2003	513349999.10555786
2004	465279995.57182175
2005	551770001.5548619
2006	624529995.6537777
2007	644109998.1516591
2008	719829995.5110997
2009	604630008.4237009
2010	581230004.2510033
2011	931759994.2535169
2012	717949990.533292
2013	794310004.5025345
2014	683229995.5189226
2015	628370000.6045406
2016	581879999.6078013
2017	737329993.0114295
2018	802210000.3212689
2019	740480002.7534366