Year	kt
1960	18.335
1961	29.336
1962	40.337
1963	47.671
1964	58.672
1965	66.006
1966	66.006
1967	47.671
1968	62.339
1969	58.672
1970	69.673
1971	73.34
1972	66.006
1973	110.01
1974	102.676
1975	113.677
1976	95.342
1977	102.676
1978	102.676
1979	110.01
1980	146.68
1981	143.013
1982	143.013
1983	143.013
1984	161.348
1985	172.349
1986	183.35
1987	194.351
1988	216.353
1989	231.021
1990	172.349
1991	176.016
1992	179.683
1993	183.35
1994	183.35
1995	183.35
1996	183.35
1997	201.685
1998	172.349
1999	194.351
2000	146.68
2001	150.347
2002	154.014
2003	194.351
2004	201.685
2005	212.686
2006	216.353
2007	231.021
2008	227.354
2009	234.688
2010	238.355
2011	245.689
2012	253.023
2013	256.69
2014	271.358
2015	278.692
2016	293.36