Year	kt
1960	0
1961	0
1962	0
1963	0
1964	0
1965	0
1966	0
1967	0
1968	0
1969	0
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	11.001
1995	14.668
1996	18.335
1997	11.001
1998	18.335
1999	14.668
2000	18.335
2001	260.357
2002	3267.297
2003	4979.786
2004	4763.433
2005	6307.24
2006	5214.474
2007	7084.644
2008	7455.011
2009	7510.016
2010	7073.643
2011	7634.694
2012	7319.332
2013	6743.613
2014	7091.978
2015	6666.606
2016	7638.361