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	0
1972	0
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	3.667
1999	40.337
2000	62.339
2001	58.672
2002	40.337
2003	110.01
2004	194.351
2005	183.35
2006	212.686
2007	194.351
2008	172.349
2009	121.011
2010	150.347
2011	146.68
2012	106.343
2013	99.009
2014	91.675
2015	95.342
2016	106.343