Year	constant 2015 US$
1963	110000
1964	100000
1965	1420000
1966	420000
1967	80000
1968	1120000
1969	770000
1970	1560000
1971	980000
1972	1130000
1973	2880000
1974	2450000
1975	7800000
1976	11940000
1977	9550000
1978	8650000
1979	12190000
1980	18380000
1981	22700000
1982	26790000
1983	31130000
1984	41880000
1985	58120000
1986	76820000
1987	68320000
1988	63780000
1989	64060000
1990	65320000
1991	84060000
1992	71860000
1993	81070000
1994	86810000
1995	78110000
1996	69220000
1997	83250000
1998	75750000
1999	86610000
2000	76290000
2001	88050000
2002	99920000
2003	91180000
2004	85010000
2005	95740000
2006	100580000
2007	101240000
2008	76960000
2009	117400000
2010	116450000
2011	118710000
2012	137430000
2013	121420000
2014	116630000
2015	98570000
2016	51600000
2017	117410000