Year	current US$
1970	31459999.864920978
1971	24939999.958500274
1972	36379999.81455504
1973	65110000.80406666
1974	96020000.45217574
1975	135209999.28191304
1976	109270001.04822218
1977	132580001.77145001
1978	256950000.37364653
1979	353160006.0220807
1980	379989997.755736
1981	379079996.6156484
1982	384599999.5470047
1983	387729996.41299236
1984	348250000.089407
1985	351689999.61018556
1986	471019998.3417986
1987	565270004.7381222
1988	562400002.4795531
1989	512590001.7917156
1990	863780000.895262
1991	821110016.5247917
1992	824480008.0060953
1993	843090001.8215183
1994	788889990.7246238
1995	791749996.2374568
1996	678280001.759529
1997	514650003.13520396
1998	607810006.7973139
1999	516489999.473095
2000	474010004.2056296
2001	354979997.37970537
2002	509869995.76352507
2003	1222129998.035729
2004	637289998.5387924
2005	624270001.6181915
2006	809800007.0787967
2007	739930005.3119667
2008	1299130016.6584554
2009	925559994.4982675
2010	835379994.2173064
2011	1092429999.817163
2012	1478449987.0315208
2013	770110003.406182
2014	889440008.9718406
2015	1120080007.795245
2016	1347090003.7679832
2017	1315809991.3373597
2018	1393820010.9396129
2019	1434510006.6401076