Year	current US$
1970	37789999.30247663
1971	30640000.648796532
1972	17379999.715834856
1973	20770000.215619788
1974	11389999.911189083
1975	15150000.039488088
1976	19949999.580159776
1977	21189999.815076575
1978	32410000.29444695
1979	42990000.90360646
1980	69140001.36032702
1981	43470000.17203389
1982	34030000.576749444
1983	34619999.4571507
1984	27469999.415799968
1985	38020000.41864809
1986	65189999.78341165
1987	61799999.304115795
1988	96699999.32870275
1989	203949998.26326987
1990	77010000.06869443
1991	157099999.08506864
1992	113429998.46860763
1993	77230000.10102993
1994	61900000.22761528
1995	68490001.0246784
1996	107539999.94322664
1997	79050001.70692806
1998	121709997.8551269
1999	157639997.1805513
2000	193700002.50078738
2001	200389998.33725384
2002	310000001.38208324
2003	278180001.05023396
2004	561109995.514155
2005	2418889890.13434
2006	3641859994.966542
2007	587440013.7625631
2008	366780001.00329524
2009	496539990.346878
2010	660469987.0236228
2011	562579989.291728
2012	612900016.6058538
2013	699530017.1431165
2014	1037750015.4078009
2015	889240008.4007542
2016	768820004.0888039
2017	702130012.5811257
2018	659760011.279955
2019	592479991.0746515