Year	current US$
1960	602700000
1961	621900000
1962	567400000
1963	580100000
1964	711000000
1965	766400000
1966	717600000
1967	626400000
1968	539700000
1969	695600000
1970	1058700000
1971	1510000000
1972	1504800000
1973	1861200000
1974	2774000000
1975	6032000000
1976	8213500000
1977	11020800000
1978	12812700000
1979	10216200003
1981	18620800000
1982	13324500000
1983	10393500000
1984	5802400000
1985	6194794877
1986	3388599315
1987	3895659161
1988	3890067006
1989	3418809276
1990	4317374913
1991	5370437042
1992	9324127400
1993	7600885803
1994	5421249249
1995	5814014059
1996	6769942473
1997	7010514955
1998	7615425456
1999	7695179387
2000	5853930997
2001	7966698451
2002	8761715352
2003	14888208536
2004	16809955694
2005	18637585328
2006	22337706396
2007	29660013272
2008	35670804973
2009	31852547728
2010	36059697709
2011	50449788022
2012	41199735359
2013	49492506493
2014	51502290146
2015	37961700352
2016	31237841305
2017	35242142338
2018	42168908275
2019	46359508379
2020	41422462072