Year	kt
1960	0
1961	7.334
1962	22.002
1963	18.335
1964	55.005
1965	135.679
1966	179.683
1967	209.019
1968	271.358
1969	271.358
1970	234.688
1971	216.353
1972	216.353
1973	95.342
1974	113.677
1975	106.343
1976	102.676
1977	102.676
1978	102.676
1979	132.012
1980	275.025
1981	278.692
1982	135.679
1983	113.677
1984	88.008
1985	95.342
1986	66.006
1987	73.34
1988	62.339
1989	62.339
1990	66.006
1991	47.671
1992	47.671
1993	47.671
1994	44.004
1995	44.004
1996	29.336
1997	29.336
1998	22.002
1999	18.335
2000	18.335
2001	18.335
2002	14.668
2003	14.668
2004	2181.865
2005	3006.94
2006	4257.387
2007	5093.463
2008	7022.305
2009	7829.045
2010	10087.917
2011	9350.85
2012	4818.438
2013	13146.195
2014	14411.31
2015	15771.767
2016	18037.973