Year	kt
1960	3.667
1961	7.334
1962	3.667
1963	11.001
1964	7.334
1965	7.334
1966	7.334
1967	3.667
1968	3.667
1969	3.667
1970	3.667
1971	3.667
1972	3.667
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	0
2002	0
2003	0
2004	0
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2016	0