Year	current US$
1960	2262500000
1961	2145600000
1962	1887000000
1963	2404200000
1964	4038700000
1965	4395800000
1966	5335400000
1967	6095430000
1968	7187990000
1969	5953370000
1970	6329510000
1971	7063920000
1972	6052910000
1973	9360440000
1974	18026650000
1975	15681480000
1976	18479550000
1977	20795180000
1978	21875900000
1979	33551790000
1980	47838750000
1981	60409923327.15
1982	61822097433.76
1983	61873454636.05
1984	59162525891.65
1985	56041938264.26
1986	38551036215.97
1987	47302311714.479996
1988	46321718779.1
1989	56414673969.43
1990	72437922604.61
1991	60346644094.77
1992	58132761364.41
1993	52220266954.59999
1994	54751995844.4
1995	58996361982.28
1996	71006792382.9
1997	71218439343.2
1998	54313022654.7
1999	78375001774.8
2000	116012694229
2001	105787497673
2002	109366643949
2003	127596515015
2004	160006915510
2005	186243973733
2006	242682381853
2007	318741520183
2008	432718458273
2009	284923272592
2010	395446293092
2011	388474364134
2012	430048636241
2013	369679036544
2014	327555108196
2015	220475149945
2016	210147862506
2017	260621914901
2018	315240594225
2019	278083609340
2020	195427065236