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	3.667
1988	3.667
1989	3.667
1990	3.667
1991	3.667
1992	7.334
1993	14.668
1994	18.335
1995	22.002
1996	51.338
1997	95.342
1998	69.673
1999	14.668
2000	40.337
2001	51.338
2002	80.674
2003	102.676
2004	121.011
2005	135.679
2006	187.017
2007	212.686
2008	297.027
2009	352.032
2010	638.058
2011	751.735
2012	784.738
2013	1136.77
2014	1191.775
2015	5155.802
2016	13846.592