Year	current US$
1970	15240000.136196613
1971	22269999.893382184
1972	28059999.983757745
1973	36910000.16778709
1974	56040000.176057205
1975	125220000.50358474
1976	101810000.22590157
1977	125339999.59379426
1978	174879999.19056886
1979	210130000.50187102
1980	253359999.7647107
1981	250009999.8284132
1982	244490001.26495948
1983	269320004.1987004
1984	323339996.5725839
1985	338640003.0702353
1986	252319997.9122727
1987	309710001.2544542
1988	365589999.9830871
1989	413299996.8230723
1990	488039999.97116625
1991	792729996.7724829
1992	966389993.9060208
1993	843209997.6241591
1994	798860002.7281795
1995	694480007.7229737
1996	236619999.90046027
1997	147689997.86674985
1998	139699999.31752688
1999	207770003.4379961
2000	215900000.49024826
2001	233989998.50824475
2002	239580000.8270889
2003	228380000.5875527
2004	179519999.32900077
2005	222520001.69456017
2006	216869999.82595447
2007	155850000.38892028
2008	199679999.94009745
2009	198089999.5695799
2010	167579997.93440107
2011	163370000.04202127
2012	226577792.44333503
2013	229155756.70171538
2014	176388428.53019014
2015	172697191.07821578
2016	182123700.23131362
2017	169470028.92568713
2018	127224792.10607708
2019	152955901.53522786
2020	156639915.32102236
2021	228372989.65454102
2022	195914625.2647041