Year	current US$
1960	664000000
1961	692200000
1962	759100000
1963	916300000
1964	953100000
1965	933300000
1966	1069900000.0000001
1967	791300000
1968	657400000
1969	667670000
1970	788060000
1971	919950000
1972	888850000
1973	908300000
1974	2351690000
1975	3933560000
1976	3807540000
1977	4815350000
1978	6726700000
1979	3836810000
1980	4859900000
1981	8780680000
1982	9077080000
1983	10275630000
1984	10765720000
1985	5495384000
1986	8787836000
1987	7594639000
1988	8658883000
1989	7526240000
1990	9279598000
1991	7861843000
1992	8291115000
1993	8194880168
1994	9451553000
1995	11738960078
1996	13019609106
1997	13168499324
1998	16478701067.000002
1999	15961955676
2000	14089439211
2001	12655291010
2002	12439455861
2003	9306090531
2004	12770561337
2005	19601203920
2006	20284212749
2007	26660966660
2008	52182957311
2009	44577199555
2010	52772533742
2011	62016395983
2012	67522263120
2013	65153454382
2014	68189919566
2015	69787447021
2016	56705799995
2017	59257800007
2018	68490034753
2019	78568916473
2020	60880821937