Year	kt
1960	0
1961	3.667
1962	3.667
1963	3.667
1964	3.667
1965	3.667
1966	3.667
1967	3.667
1968	3.667
1969	3.667
1970	3.667
1971	3.667
1972	3.667
1973	3.667
1974	3.667
1975	3.667
1976	3.667
1977	0
1978	0
1979	3.667
1980	3.667
1981	3.667
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	139.346
1991	135.679
1992	176.016
1993	146.68
1994	139.346
1995	146.68
1996	168.682
1997	179.683
1998	187.017
1999	190.684
2000	190.684
2001	139.346
2002	234.688
2003	227.354
2004	176.016
2005	154.014
2006	73.34
2007	95.342
2008	128.345
2009	135.679
2010	113.677
2011	212.686
2012	194.351
2013	234.688
2014	275.025
2015	260.357
2016	194.351