Year	current US$
1960	23000000
1961	26300000
1963	32000000
1964	35900000
1966	32900000
1967	19100000
1968	29680000
1969	32469000
1970	31345000
1971	34502000
1972	43416000
1973	46602000
1974	62038000
1975	88578000
1976	94279000
1977	62031000
1978	106558000
1980	132588000
1981	152424146.2
1982	199309000
1983	107800000
1984	63631000
1985	108743000
1986	80392000
1987	140995068.8
1988	126136662.2
1989	120069729.80000001
1990	150324553.29999998
1991	98330292.99000001
1992	129996674.39999999
1993	121242539.3
1994	151927700.7
1995	172040518
1996	192228161.6
1997	157347245.5
1998	126769542.9
1999	116354871.1
2000	124138768
2001	84510248
2002	127040257
2003	167493506
2004	179064577
2005	214165601
2006	332370735
2007	187863599
2008	204365208
2009	272825231
2010	354981382
2011	473713561
2012	462911865
2013	630215275
2014	671503731
2015	677525890
2016	621377363
2017	462647351
2018	534801924
2019	622598681
2020	521824202