Year	kt
1960	124.678
1961	124.678
1962	124.678
1963	139.346
1964	660.06
1965	623.39
1966	652.726
1967	601.388
1968	689.396
1969	707.731
1970	726.066
1971	722.399
1972	704.064
1973	696.73
1974	726.066
1975	938.752
1976	1041.428
1977	957.087
1978	997.424
1979	924.084
1980	1026.76
1981	1206.443
1982	1298.118
1983	946.086
1984	1162.439
1985	1188.108
1986	1342.122
1987	1261.448
1988	1202.776
1989	1078.098
1990	1309.119
1991	1184.441
1992	1268.782
1993	1334.788
1994	1393.46
1995	946.086
1996	1023.093
1997	788.405
1998	1092.766
1999	1481.468
2000	1397.127
2001	1048.762
2002	1147.771
2003	1268.782
2004	1983.847
2005	3347.971
2006	3832.015
2007	5350.153
2008	7436.676
2009	9394.854
2010	12588.811
2011	11675.728
2012	12955.511
2013	11873.746
2014	16545.504
2015	16259.478
2016	17102.888