Year	kt
1960	448419.095
1961	443241.291
1962	437667.451
1963	439662.299
1964	426589.444
1965	422614.416
1966	403674.361
1967	368782.856
1968	370601.688
1969	368247.474
1970	353190.772
1971	341691.06
1972	293385.669
1973	296091.915
1974	263580.293
1975	276414.793
1976	275182.681
1977	271302.995
1978	259348.575
1979	281790.615
1980	260921.718
1981	261618.448
1982	244944.599
1983	247427.158
1984	177691.819
1985	234493.649
1986	248677.605
1987	259495.255
1988	249972.056
1989	246081.369
1990	236125.464
1991	236682.848
1992	224900.777
1993	197291.934
1994	185799.556
1995	175795.98
1996	165026.001
1997	149147.891
1998	145836.59
1999	130229.838
2000	137380.488
2001	146404.975
2002	134729.247
2003	144890.504
2004	140666.12
2005	143372.366
2006	155821.831
2007	146947.691
2008	135902.687
2009	111891.171
2010	116280.57
2011	114769.766
2012	145642.239
2013	141208.836
2014	114509.409
2015	90435.554
2016	45012.425