Year	current US$
1970	9659999.934956435
1971	12660000.23670495
1972	19579999.782145023
1973	15440000.118687738
1974	19459999.70287084
1975	46799999.88153573
1976	39610000.31791631
1977	30140000.14029445
1978	52500000.631436676
1979	51899999.804794736
1980	73190000.56199723
1981	71169999.33496115
1982	76200000.06444752
1983	87540000.10341403
1984	91760001.72272323
1985	91470000.44211742
1986	102299999.39352274
1987	142150000.3375112
1988	173140001.91167003
1989	174840001.51418138
1990	180140002.49281514
1991	295439999.8951701
1992	267999999.63678414
1993	229760000.53435576
1994	298879996.6033548
1995	254270001.31085515
1996	236179998.02902326
1997	171860002.2867322
1998	200569999.03172258
1999	180540000.79445535
2000	160159999.60899353
2001	152569998.70762235
2002	180470000.63955793
2003	224319998.83241948
2004	250200001.58250335
2005	261189997.5351989
2006	233059998.02239233
2007	256289998.07499355
2008	242919998.29746792
2009	280639997.8958071
2010	310800001.30459666
2011	423590000.8399038
2012	426369999.37146926
2013	539540002.7744472
2014	573430001.3352185
2015	605149998.9815058
2016	535620000.5281717
2017	546039997.6354091
2018	544569994.5855885
2019	545689999.6157738
2020	568960002.8991698
2021	619860000.954941
2022	543049993.6901032