Year	current US$
1960	392300000
1961	364400000
1966	621200000
1967	723200000
1968	830600000
1969	929700000
1970	1000500000
1971	852410000
1972	1280810000
1973	1885780000
1974	4684850000
1975	4699460000
1976	5331890000
1977	5792170000
1978	6266390000
1979	9863130000
1980	15621250000
1981	13296010000
1982	11475880000
1983	13016060000
1984	13054622239
1985	12502110000
1986	7360810000
1987	8582330000
1988	8154181000
1989	8953333000
1990	11008838000
1991	11771069000
1992	11136802000
1993	10099883000
1994	8591748000
1995	9356681076
1996	11099194000
1997	13730605231
1998	10025298621
1999	12740027541
2000	21953693744
2001	18379677757
2002	18935190063
2003	24644779903
2004	31159358230
2005	46553615522
2006	55154169672
2007	59168038584
2008	79297200334
2009	45193960671
2010	57000166171
2011	73472962419
2012	71865780585
2013	65950790080.00001
2014	60119463634
2015	34563343367
2016	28960146207
2017	35146051552
2018	41168251685
2019	42250500347
2020	29106001805