Year	current US$
1960	158400000
1961	173300000
1962	180700000
1963	202800000
1964	217500000
1965	213600000
1966	225204000
1967	222100000
1968	219200000
1969	280738000
1970	341145000
1971	343188000
1972	374197000
1973	390189000
1974	729721000
1975	782912000
1976	606998000
1977	744495000
1978	749657000
1979	818214000
1980	960505000
1981	972907000
1982	765627000
1983	684008000
1984	742943000
1985	567526000
1986	582095000
1987	707627000
1988	860433000
1989	980983000
1990	1132220587
1991	1172607709
1992	1364184818
1993	1510122469
1994	1646638577
1995	1845822705
1996	1969206137
1997	1896022164
1998	1316304585
1999	1245336582
2000	1301555860
2001	1228101670
2002	1118969825
2003	1207406118
2004	1405726678
2005	1549801563
2006	2040124478
2007	2347031416
2008	2440704241
2009	1375507826
2010	1352275813
2011	1748651387
2012	1754915230
2013	1596648919
2014	1463447444
2015	1276356803
2016	1199995011
2017	1376407433
2018	1899212276
2019	1728186871
2020	1398212067