Year	kt
1964	2753.917
1965	3223.293
1966	2838.258
1967	3681.668
1968	3329.636
1969	2889.596
1970	2438.555
1971	2174.531
1972	2339.546
1973	2251.538
1974	1987.514
1975	1859.169
1976	1796.83
1977	1591.478
1978	1404.461
1979	1342.122
1980	1353.123
1981	1133.103
1982	1353.123
1983	1012.092
1984	1129.436
1985	1107.434
1986	1224.778
1987	1026.76
1988	1382.459
1989	876.413
1990	832.409
1991	839.743
1992	872.746
1993	883.747
1994	839.743
1995	330.03
1996	421.705
1997	484.044
1998	462.042
1999	278.692
2000	289.693
2001	300.694
2002	304.361
2003	322.696
2004	238.355
2005	315.362
2006	132.012
2007	293.36
2008	315.362
2009	407.037
2010	381.368
2011	267.691
2012	348.365
2013	458.375
2014	484.044
2015	484.044
2016	854.411