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	3446.98
1991	3494.651
1992	3520.32
1993	3927.357
1994	3927.357
1995	3927.357
1996	3534.988
1997	3157.287
1998	2658.575
1999	3476.316
2000	3201.291
2001	4158.378
2002	4125.375
2003	2471.558
2004	6369.579
2005	6318.241
2006	6131.224
2007	7898.718
2008	8126.072
2009	7044.307
2010	8874.14
2011	8808.134
2012	9262.842
2013	9391.187
2014	9050.156
2015	9974.24
2016	10131.921