Year	kt
1960	29.336
1961	55.005
1962	66.006
1963	88.008
1964	95.342
1965	91.675
1966	128.345
1967	121.011
1968	150.347
1969	179.683
1970	201.685
1971	216.353
1972	238.355
1973	293.36
1974	278.692
1975	326.363
1976	315.362
1977	348.365
1978	396.036
1979	462.042
1980	498.712
1981	590.387
1982	612.389
1983	601.388
1984	575.719
1985	575.719
1986	557.384
1987	546.383
1988	564.718
1989	572.052
1990	370.367
1991	333.697
1992	322.696
1993	366.7
1994	341.031
1995	304.361
1996	366.7
1997	399.703
1998	425.372
1999	425.372
2000	447.374
2001	399.703
2002	407.037
2003	462.042
2004	436.373
2005	429.039
2006	399.703
2007	465.709
2008	509.713
2009	667.394
2010	828.742
2011	927.751
2012	1342.122
2013	1540.14
2014	1646.483
2015	1668.485
2016	1631.815