Year	kt
1960	33.003
1961	3.667
1964	11.001
1965	80.674
1966	201.685
1967	227.354
1968	278.692
1969	304.361
1970	366.7
1971	399.703
1972	381.368
1973	370.367
1974	311.695
1975	337.364
1976	333.697
1977	341.031
1978	440.04
1979	447.374
1980	465.709
1981	436.373
1982	436.373
1983	271.358
1984	333.697
1985	440.04
1986	458.375
1987	436.373
1988	436.373
1989	436.373
1990	425.372
1991	326.363
1992	264.024
1993	132.012
1994	484.044
1995	454.708
1996	341.031
1997	564.718
1998	564.718
1999	583.053
2000	535.382
2001	506.046
2002	487.711
2003	399.703
2004	392.369
2005	381.368
2006	385.035
2007	399.703
2008	414.371
2009	381.368
2010	370.367
2011	374.034
2012	520.714
2013	799.406
2014	179.683
2015	231.021
2016	322.696