Year	kt
1960	124.678
1961	62.339
1962	91.675
1963	22.002
1964	77.007
1965	55.005
1966	88.008
1967	55.005
1968	102.676
1969	91.675
1970	47.671
1971	29.336
1972	7.334
1973	22.002
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