Year	current US$
1970	37270000.293850906
1971	48860000.47437842
1972	50630000.09767708
1973	52269999.93622307
1974	77189999.76292253
1975	136930001.18434435
1976	113249999.68148771
1977	130190001.01089485
1978	200920001.098886
1979	235450001.29938123
1980	349129995.34606934
1981	423660003.4534931
1982	316350000.6198883
1983	323339998.48365784
1984	381099999.9046326
1985	405059998.1546406
1986	439029996.2759017
1987	454010002.2554399
1988	728060006.3502792
1989	735130009.8896027
1990	853900005.1021575
1991	899859996.1996077
1992	1400319997.7874758
1993	974779995.9182737
1994	1036149989.8433682
1995	983859999.1202357
1996	822070000.8869174
1997	829230009.5558168
1998	879279998.7792964
1999	937409999.370575
2000	703779991.8651578
2001	1022440007.7760221
2002	1064329994.2612643
2003	1549389981.3592434
2004	1732860011.8160257
2005	2047130011.2009068
2006	2160719999.790192
2007	2486129972.994327
2008	2896490019.083025
2009	2386919992.923737
2010	2764140017.509461
2011	2518989997.863771
2012	2513619982.06377
2013	2350069991.1117554
2014	2411589986.6819386
2015	1945010004.576295
2016	2032610013.9617927
2017	2264569998.9795685
2018	1961039993.643761
2019	1827159999.0129476