Year	current US$
1981	263320019.39999998
1982	287148400
1983	252988000
1984	227617000
1985	309405889.9
1986	184339498.4
1987	205304944.29999998
1988	201276157.6
1989	196493380.1
1990	214847992.1
1991	214430000
1992	470011381.3
1993	463052874.90000004
1994	391874951.2
1995	440374517.4
1996	410245030.6
1997	401665735.6
1998	565211794
1999	617287307.5
2000	301440394
2001	331413275
2002	292788345
2003	302868488
2004	305544824
2005	309232099
2006	373759195
2007	475221809
2008	533759753.00000006
2009	769131935
2010	738996491
2011	817785295
2012	850171875
2013	856872859
2014	946100763
2015	1025603061.9999999
2016	1107680261
2017	1194452007
2018	1147985213
2019	1441403897
2020	1424861618