Year	current US$
1970	129540001.21727595
1971	155520000.6980448
1972	133419999.70190224
1973	208629999.89651144
1974	303799999.4792045
1975	368870001.9624086
1976	293890003.3440441
1977	287430000.388995
1978	480980000.32640976
1979	655909996.6287608
1980	586909997.3365667
1981	728470003.694296
1982	579899997.8303908
1983	522649998.0688097
1984	657740000.5459783
1985	621449997.8125099
1986	795439993.1430817
1987	768730000.510812
1988	1328590013.712645
1989	1372430009.1266627
1990	1505800008.296966
1991	1602420001.931488
1992	2249529998.5408783
1993	1647699995.8753588
1994	1864849998.4741206
1995	1699670001.447201
1996	1584169998.7649915
1997	1410880001.9025803
1998	1533969998.9557264
1999	1400629995.8825111
2000	1044359990.3583524
2001	1613760006.0403354
2002	1725219995.0814238
2003	2314059981.9123745
2004	2724950014.829636
2005	3043300003.886224
2006	3249069989.6812434
2007	3936109977.543354
2008	4598170025.587084
2009	3981199989.557266
2010	4317610003.501178
2011	4009440005.8239703
2012	4200699971.7354774
2013	4092799954.3994665
2014	4469829983.115198
2015	3653430005.129428
2016	3836659998.0145693
2017	4162370022.773742
2018	4104919996.1423864
2019	3551219985.7831006
2020	4390840023.577212
2021	3391909988.5523314
2022	3131000002.2649784