Year	current US$
1960	123300000
1961	133699999.99999999
1962	147700000
1963	163500000
1964	204100000
1965	198000000
1966	220300000
1967	236500000
1968	268100000.00000003
1969	326937000
1970	423413000
1971	408004000
1972	478640000
1973	802065000
1974	1229332000
1981	1355401259
1982	1270076364
1983	1741332033
1984	1918280354
1985	2177059436
1986	1555469680
1987	2219857069
1988	2487614797
1989	2880977578
1990	3748110048
1991	3097252128
1992	3526519101
1993	2883454150
1994	2933630238
1995	3411511371
1996	4543804990
1997	4310245646
1998	3477237988
1999	4393559278
2000	17729039355
2001	17136619379
2002	17646971030
2003	18457392307
2004	20231774645
2005	24949295382
2006	28579145466
2007	41865960552
2008	59855472829
2009	39498298659
2010	50449109754
2011	62108300600
2012	67196876308.00001
2013	64807330190
2014	57316713091
2015	32864472864.000004
2016	27450091190
2017	33706697666
2018	40526518919
2019	31507749234
2020	14490639764