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	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	3.667
2002	3.667
2003	3.667
2004	7.334
2005	139.346
2006	161.348
2007	69.673
2008	117.344
2009	150.347
2010	154.014
2011	183.35
2012	172.349
2013	355.699
2014	1327.454
2015	1741.825
2016	1320.12