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	3.667
1972	0
1973	14.668
1974	11.001
1975	0
1976	0
1977	0
1978	0
1979	0
1980	0
1981	66.006
1982	36.67
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	3.667
1990	3.667
1991	3.667
1992	3.667
1993	3.667
1994	3.667
1995	3.667
1996	3.667
1997	3.667
1998	3.667
1999	3.667
2000	3.667
2001	3.667
2002	3.667
2003	7.334
2004	7.334
2005	7.334
2006	7.334
2007	3.667
2008	3.667
2009	3.667
2010	3.667
2011	3.667
2012	3.667
2013	3.667
2014	3.667
2015	3.667
2016	3.667