Year	current US$
1960	400000
1970	42377000
1981	414714139.2
1982	391174124.09999996
1983	402868490.5
1984	462455330.1
1985	473812856.2
1986	439403358.79999995
1987	492152471.3
1988	466575313.40000004
1989	573230742.3
1990	606060544.8
1991	652757208.2
1992	573386628.4
1993	543434861.8000001
1994	708594926.6999999
1995	682926296.6
1996	659316178
1997	640062842.5
1998	625250829.9
1999	490604939.2
2000	616679692
2001	542680978
2002	604742149
2003	642026324
2004	566299954
2005	876779387
2006	654652315
2007	1241711918
2008	2281181348
2009	1672676317
2010	2594942783
2011	2782982900
2012	2405590195
2013	1940961715
2014	2098973982
2015	1749026378
2016	2525436004
2017	2407789515
2018	2389154577
2019	2885611261
2020	3599622647