Year	kt
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	3.667
1979	3.667
1980	7.334
1981	7.334
1982	14.668
1983	18.335
1984	18.335
1985	14.668
1986	18.335
1987	25.669
1988	18.335
1989	18.335
1990	14.668
1991	14.668
1992	18.335
1993	18.335
1994	18.335
1995	18.335
1996	18.335
1997	18.335
1998	18.335
1999	7.334
2000	7.334
2001	11.001
2002	11.001
2003	7.334
2004	7.334
2005	7.334
2006	14.668
2007	11.001
2008	14.668
2009	14.668
2010	18.335
2011	11.001
2012	29.336
2013	22.002
2014	14.668
2015	7.334
2016	14.668