Year	kt
1960	128.345
1961	176.016
1962	297.027
1963	264.024
1964	300.694
1965	381.368
1966	429.039
1967	399.703
1968	333.697
1969	363.033
1970	436.373
1971	359.366
1972	190.684
1973	311.695
1974	304.361
1975	399.703
1976	425.372
1977	451.041
1978	575.719
1979	352.032
1980	315.362
1981	333.697
1982	385.035
1983	385.035
1984	392.369
1985	399.703
1986	425.372
1987	443.707
1988	366.7
1989	337.364
1990	278.692
1991	249.356
1992	22.002
1993	18.335
1994	14.668
1995	14.668
1996	7.334
1997	3.667
1998	3.667
1999	3.667
2000	3.667
2001	69.673
2002	55.005
2003	91.675
2004	91.675
2005	106.343
2006	161.348
2007	748.068
2008	1078.098
2009	1536.473
2010	2299.209
2011	4305.058
2012	3667
2013	3942.025
2014	4378.398
2015	3975.028
2016	4829.439