Year	constant 2015 US$
1961	93082000
1962	73328000
1963	76184000
1964	82637000
1965	82726000
1966	84884000
1967	83687000
1968	98266000
1969	114331000
1970	120636000
1971	127928000
1972	134518000
1973	137217000
1974	197920000
1975	341049000
1976	278786000
1977	241231000
1978	205218000
1979	224165000
1980	215543000
1981	194361000
1982	194619000
1983	190730000
1984	189723000
1985	186686000
1986	212625000
1987	191529000
1988	192176000
1989	168692000
1990	179365000
1991	193646000
1992	198401000
1993	194501000
1994	197721000
1995	196043000
1996	181033000
1997	237280000
1998	244786000
1999	253734000
2000	244317000
2001	249412000
2002	245517000
2003	262073000
2004	284326000
2005	336874000
2006	337729000
2007	353328000
2008	393009000
2009	383102000
2010	357397000
2011	392936000
2012	406932000
2013	397731000
2014	426411000
2015	441740000
2016	430491000