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	0
2000	0
2001	0
2002	0
2003	568.385
2004	238.355
2005	473.043
2006	590.387
2007	1004.758
2008	927.751
2009	993.757
2010	1496.136
2011	1679.486
2012	1991.181
2013	2038.852
2014	2005.849
2015	2027.851
2016	1914.174