Year	kt
1960	938.752
1961	707.731
1962	916.75
1963	575.719
1964	594.054
1965	370.367
1966	253.023
1967	550.05
1968	220.02
1969	498.712
1970	583.053
1971	601.388
1972	381.368
1973	201.685
1974	436.373
1975	671.061
1976	436.373
1977	344.698
1978	447.374
1979	143.013
1980	154.014
1981	205.352
1982	271.358
1983	242.022
1984	267.691
1985	289.693
1986	187.017
1987	146.68
1988	121.011
1989	187.017
1990	275.025
1991	289.693
1992	121.011
1993	51.338
1994	40.337
1995	66.006
1996	47.671
1997	51.338
1998	55.005
1999	366.7
2000	1360.457
2001	1565.809
2002	1235.779
2003	601.388
2004	729.733
2005	586.72
2006	953.42
2007	821.408
2008	649.059
2009	608.722
2010	1232.112
2011	1664.818
2012	1705.155
2013	1144.104
2014	1158.772
2015	927.751
2016	1210.11