Year	constant 2015 US$
1961	17349000
1962	19320000
1963	23531000
1964	20380000
1965	14926000
1966	24236000
1967	29000000
1968	35628000
1969	99596000
1970	48724000
1971	88489000
1972	123886000
1973	136660000
1974	148828000
1975	162607000
1976	159171000
1977	145471000
1978	154625000
1979	221361000
1980	237294000
1981	299785000
1982	329758000
1983	373524000
1984	430760000
1985	500346000
1986	579480000
1987	662912000
1988	821473000
1989	922803000
1990	936898000
1991	1072386000
1992	815912000
1993	563829000
1994	412862000
1995	443524000
1996	490734000
1997	503846000
1998	526737000
1999	572439000
2000	579825000
2001	605706000
2002	677308000
2003	681225000
2004	749582000
2005	984960000
2006	894094000
2007	938233000
2008	1026192000
2009	1154694000
2010	1249890000
2011	1224274000
2012	1207391000
2013	1239697000
2014	1388850000
2015	1288000000
2016	1050069000