Year	kt
1960	161.348
1961	128.345
1962	135.679
1963	121.011
1964	143.013
1965	150.347
1966	113.677
1967	143.013
1968	154.014
1969	201.685
1970	282.359
1971	293.36
1972	388.702
1973	381.368
1974	407.037
1975	443.707
1976	260.357
1977	297.027
1978	363.033
1979	366.7
1980	374.034
1981	282.359
1982	333.697
1983	304.361
1984	352.032
1985	594.054
1986	535.382
1987	388.702
1988	454.708
1989	506.046
1990	557.384
1991	660.06
1992	715.065
1993	880.08
1994	1034.094
1995	1037.761
1996	1085.432
1997	1118.435
1998	1114.768
1999	1463.133
2000	1474.134
2001	1690.487
2002	1954.511
2003	2229.536
2004	2383.55
2005	2269.873
2006	3127.951
2007	3722.005
2008	3740.34
2009	4004.364
2010	4440.737
2011	4330.727
2012	4110.707
2013	4334.394
2014	4495.742
2015	5060.46
2016	5258.478