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	40.337
1979	3.667
1980	44.004
1981	29.336
1982	73.34
1983	14.668
1984	73.34
1985	124.678
1986	847.077
1987	1378.792
1988	2306.543
1989	5478.498
1990	6538.261
1991	7990.393
1992	8738.461
1993	9710.216
1994	10355.608
1995	13252.538
1996	16002.788
1997	19105.07
1998	20487.529
1999	24257.205
2000	28943.631
2001	30626.784
2002	33747.401
2003	40586.356
2004	42848.895
2005	52199.745
2006	59486.074
2007	69680.334
2008	69152.286
2009	66229.687
2010	71906.203
2011	84256.659
2012	85342.091
2013	86013.152
2014	92082.037
2015	90200.866
2016	87630.299