Year	constant 2015 US$
1960	80976000
1961	118878000
1962	71372000
1963	95194000
1964	138615000
1965	110872000
1966	195390000
1967	233141000
1968	261935000
1969	464356000
1970	462934000
1971	536137000
1972	592248000
1973	633631000
1974	722236000
1975	734105000
1976	737858000
1977	808937000
1978	1024260000
1979	1085500000
1980	1118135000
1981	1073276000
1982	1173886000
1983	1141703000
1984	1385952000
1985	1331516000
1986	1565809000
1987	1561606000
1988	1586146000
1989	1668955000
1990	1716593000
1991	1769134000
1992	1906161000
1993	1958742000
1994	2042042000
1995	1993409000
1996	2208643000
1997	2277010000
1998	2374733000
1999	2475904000
2000	2673872000
2001	2635294000
2002	2452861000
2003	2144818000
2004	2228872000
2005	2245517000
2006	2311814000
2007	2368395000
2008	2362476000
2009	2437306000
2010	2536865000
2011	2453585000
2012	2378139000
2013	2486253000
2014	2531746000
2015	2565570000
2016	2367965000