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	55.005
1996	3146.286
1997	4917.447
1998	4613.086
1999	5086.129
2000	4587.417
2001	4697.427
2002	4576.416
2003	2922.599
2004	4224.384
2005	4220.717
2006	4462.739
2007	3854.017
2008	4576.416
2009	5177.804
2010	6483.256
2011	5273.146
2012	4888.111
2013	4759.766
2014	4649.756
2015	6087.22
2016	6241.234