Year	constant 2015 US$
1960	381010000
1961	725700000
1962	543110000
1963	637480000
1964	676210000
1965	704890000
1966	614910000
1967	403740000
1968	584430000
1969	487010000
1970	485980000
1971	699410000
1972	485940000
1973	394660000
1974	444240000
1975	882610000
1976	823950000
1977	1843500000
1978	1119120000
1979	1242510000
1980	2506030000
1981	2350310000
1982	1969400000
1983	1061480000
1984	817080000
1985	2051860000
1986	820990000
1987	703420000
1988	755730000
1989	790160000
1990	1712280000
1991	2071770000
1992	1181620000
1993	1033850000
1994	861670000
1995	574310000
1996	741290000
1997	600560000
1998	686170000
1999	886500000
2000	606920000
2001	707500000
2002	506000000
2003	675110000
2004	815510000
2005	758360000
2006	1104470000
2007	1118080000
2008	1260400000
2009	900140000
2010	881390000
2011	1242840000
2012	1329900000
2013	1786140000
2014	1944340000
2015	1488320000
2016	1992340000
2017	1839090000