Year	kt
1960	682.062
1961	663.727
1962	374.034
1963	436.373
1964	740.734
1965	792.072
1966	916.75
1967	858.078
1968	924.084
1969	777.404
1970	1059.763
1971	916.75
1972	322.696
1973	275.025
1974	333.697
1975	271.358
1976	198.018
1977	249.356
1978	117.344
1979	234.688
1980	319.029
1981	216.353
1982	172.349
1983	256.69
1984	275.025
1985	469.376
1986	465.709
1987	410.704
1988	451.041
1989	550.05
1990	436.373
1991	465.709
1992	322.696
1993	418.038
1994	535.382
1995	495.045
1996	667.394
1997	300.694
1998	319.029
1999	293.36
2000	652.726
2001	663.727
2002	707.731
2003	803.073
2004	718.732
2005	667.394
2006	726.066
2007	627.057
2008	641.725
2009	726.066
2010	1210.11
2011	1162.439
2012	1254.114
2013	1232.112
2014	1789.496
2015	1881.171
2016	2427.554