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	95.342
1996	858.078
1997	1404.461
1998	1639.149
1999	2394.551
2000	2420.22
2001	2625.572
2002	2676.91
2003	2350.547
2004	2988.605
2005	3336.97
2006	3135.285
2007	2889.596
2008	3039.943
2009	2786.92
2010	3039.943
2011	2995.939
2012	3267.297
2013	3751.341
2014	3784.344
2015	3861.351
2016	4316.059