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	0
1999	40.337
2000	572.052
2001	531.715
2002	1034.094
2003	979.089
2004	1129.436
2005	1562.142
2006	1690.487
2007	1188.108
2008	1184.441
2009	770.07
2010	1287.117
2011	1290.784
2012	1514.471
2013	2280.874
2014	2471.558
2015	3538.655
2016	4158.378