Year	kt
1960	11.001
1961	84.341
1962	80.674
1963	84.341
1964	91.675
1965	106.343
1966	132.012
1967	139.346
1968	128.345
1969	190.684
1970	62.339
1971	69.673
1972	99.009
1973	117.344
1974	286.026
1975	249.356
1976	304.361
1977	337.364
1978	645.392
1979	678.395
1980	667.394
1981	674.728
1982	667.394
1983	605.055
1984	465.709
1985	421.705
1986	462.042
1987	605.055
1988	594.054
1989	865.412
1990	1437.464
1991	1507.137
1992	1822.499
1993	1881.171
1994	2207.534
1995	2453.223
1996	2794.254
1997	3369.973
1998	2882.262
1999	3105.949
2000	5364.821
2001	2702.579
2002	4506.743
2003	4070.37
2004	3989.696
2005	4514.077
2006	7451.344
2007	4140.043
2008	4770.767
2009	5031.124
2010	5727.854
2011	6127.557
2012	6772.949
2013	7051.641
2014	7656.696
2015	7869.382
2016	8668.788