Year	kt
1960	91.675
1961	99.009
1962	88.008
1963	91.675
1964	77.007
1965	58.672
1966	62.339
1967	47.671
1968	47.671
1969	58.672
1970	62.339
1971	154.014
1972	33.003
1973	128.345
1974	161.348
1975	69.673
1976	95.342
1977	117.344
1978	91.675
1979	135.679
1980	205.352
1981	385.035
1982	355.699
1983	993.757
1984	1092.766
1985	1441.131
1986	1063.43
1987	1301.785
1988	1162.439
1989	4807.437
1990	5416.159
1991	6076.219
1992	6329.242
1993	5390.49
1994	6237.567
1995	6336.576
1996	7744.704
1997	6380.58
1998	6288.905
1999	5210.807
2000	7880.383
2001	9937.57
2002	12555.808
2003	18228.657
2004	31745.219
2005	26131.042
2006	26648.089
2007	29959.39
2008	38067.127
2009	46629.572
2010	55382.701
2011	55588.053
2012	59918.78
2013	58037.609
2014	57912.931
2015	66372.7
2016	71777.858