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	146.68
1987	4338.061
1988	5614.177
1989	5427.16
1990	6241.234
1991	7220.323
1992	9295.845
1993	11851.744
1994	15724.096
1995	19064.733
1996	24997.939
1997	30531.442
1998	28609.934
1999	34836.5
2000	38958.208
2001	42925.902
2002	48576.749
2003	50402.915
2004	57916.598
2005	62698.366
2006	65749.31
2007	71370.821
2008	72870.624
2009	72632.269
2010	88488.377
2011	95250.325
2012	103017.031
2013	109060.247
2014	98796.314
2015	90116.525
2016	94619.601