Year	kt
1960	165.015
1961	161.348
1962	253.023
1963	355.699
1964	484.044
1965	557.384
1966	612.389
1967	612.389
1968	858.078
1969	1235.779
1970	1408.128
1971	1481.468
1972	1463.133
1973	1437.464
1974	1679.486
1975	1441.131
1976	1426.463
1977	1422.796
1978	1441.131
1979	1877.504
1980	1991.181
1981	1895.839
1982	561.051
1983	667.394
1984	660.06
1985	674.728
1986	682.062
1987	715.065
1988	766.403
1989	623.39
1990	447.374
1991	370.367
1992	385.035
1993	421.705
1994	421.705
1995	421.705
1996	429.039
1997	451.041
1998	480.377
1999	385.035
2000	392.369
2001	421.705
2002	414.371
2003	458.375
2004	498.712
2005	597.721
2006	612.389
2007	568.385
2008	498.712
2009	447.374
2010	733.4
2011	821.408
2012	916.75
2013	803.073
2014	1078.098
2015	1089.099
2016	1265.115