Year	kt
1960	3.667
1961	3.667
1962	0
1963	3.667
1964	3.667
1965	3.667
1966	3.667
1967	3.667
1968	3.667
1969	3.667
1970	3.667
1971	3.667
1972	3.667
1973	3.667
1974	3.667
1975	3.667
1976	3.667
1977	3.667
1978	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	73.34
1987	616.056
1988	256.69
1989	696.73
1990	25.669
1991	150.347
1992	370.367
1993	319.029
1994	275.025
1995	293.36
1996	341.031
1997	370.367
1998	718.732
1999	619.723
2000	245.689
2001	539.049
2002	619.723
2003	2805.255
2004	2064.521
2005	1265.115
2006	1870.17
2007	1932.509
2008	2112.192
2009	2064.521
2010	1851.835
2011	2515.562
2012	1987.514
2013	2442.222
2014	3197.624
2015	2893.263
2016	2874.928