Year	kt
1960	95.342
1961	113.677
1962	377.701
1963	451.041
1964	531.715
1965	568.385
1966	473.043
1967	597.721
1968	982.756
1969	810.407
1970	924.084
1971	495.045
1972	546.383
1973	982.756
1974	704.064
1975	671.061
1976	539.049
1977	1070.764
1978	374.034
1979	601.388
1980	733.4
1981	271.358
1982	381.368
1983	502.379
1984	634.391
1985	326.363
1986	337.364
1987	399.703
1988	663.727
1989	1026.76
1990	1217.444
1991	1140.437
1992	1232.112
1993	1004.758
1994	762.736
1995	18.335
1996	58.672
1997	124.678
1998	3520.32
1999	132.012
2000	476.71
2001	176.016
2002	66.006
2003	157.681
2004	0
2005	135.679
2006	157.681
2007	403.37
2008	513.38
2009	861.745
2010	755.402
2011	777.404
2012	799.406
2013	795.739
2014	748.068
2015	517.047
2016	469.376