Year	constant 2015 US$
1960	737290000
1961	771320000
1962	899090000
1963	869240000
1964	945550000
1965	1030860000
1966	649100000
1967	634330000
1968	512140000
1969	551830000
1970	562630000
1971	627810000
1972	627080000
1973	606420000
1974	696440000
1975	859270000
1976	630730000
1977	771500000
1978	795510000
1979	936960000
1980	888090000
1981	905230000
1982	843080000
1983	787730000
1984	800970000
1985	778380000
1986	854020000
1987	1137810000
1988	887830000
1989	1152350000
1990	1229770000
1991	647660000
1992	351580000
1993	236210000
1994	308460000
1995	218260000
1996	194570000
1997	205850000
1998	168370000
1999	182550000
2000	261880000
2001	366350000
2002	1612150000
2003	6543840000
2004	2047210000
2005	1968780000
2006	2350780000
2007	1263580000
2008	1588960000
2009	2221910000
2010	3203400000
2011	4977800000
2012	2588430000
2013	2327820000
2014	2158560000
2015	2588050000
2016	2102210000
2017	2243040000