Year	current US$
1970	5979999.983683224
1971	8569999.957457177
1972	13130000.120028857
1973	23220000.252127636
1974	36679999.76873399
1975	44990000.35971402
1976	72629999.65995555
1977	117869999.69556925
1978	133889998.2385338
1979	181589997.02334395
1980	274110000.03665704
1981	239289998.52947894
1982	224890004.2455644
1983	177339999.78937203
1984	210560000.3525614
1985	176159998.14122915
1986	322760005.84661967
1987	359749996.4646994
1988	372619997.8925289
1989	306899998.74308705
1990	409620000.81315637
1991	262540000.74230126
1992	407330000.4880874
1993	371039998.8759309
1994	375070002.2466481
1995	513699998.4029682
1996	496020001.411438
1997	404469993.5186655
1998	441849997.84454703
1999	307199999.6136876
2000	413970000.3378094
2001	494429998.78525734
2002	650789995.9404025
2003	665690002.018586
2004	725330002.2426994
2005	756780010.642484
2006	648259993.6313931
2007	756089990.9883734
2008	885439997.4942212
2009	685729998.6779692
2010	915029997.8442485
2011	508279999.63425076
2012	404119990.73438346
2013	400099999.19869006
2014	349099991.99211586
2015	273960009.82262194
2016	321320000.7677078
2017	339060001.82032585
2018	378750006.8694354
2019	379239996.93989766