Year	current US$
1961	25000000
1962	26100000
1963	40800000
1964	35200000
1965	37500000
1966	42900000
1967	42428000
1968	36600000
1970	45508000
1971	43345000
1972	44805000
1973	53535000
1974	84732000
1975	106472000
1976	86351000
1977	95357000
1978	129816000
1979	150655000
1980	214185000
1981	193408000
1982	257034000
1983	320732000
1984	389453000
1985	345862000
1986	273238000
1987	154786000
1988	173250000
1989	194504575.8
1990	208977873
1991	204820000
1992	163506572.2
1993	134098000.00000001
1994	146740899.89999998
1995	239180086.4
1996	278333196.40000004
1997	282943660
1998	253136585.5
1999	263809231.5
2000	273030259
2001	259340693.99999997
2002	241479944
2003	193014745
2004	208936738
2005	259956653.00000003
2006	326331753
2007	308148148
2008	364985929
2009	322155304
2010	313365134
2011	377767228
2012	430083547
2013	338868736
2014	363186805
2015	406512473
2016	448275886
2017	485390940
2018	457728630
2019	398315017
2020	344282464