Year	kt
1960	223.687
1961	267.691
1962	238.355
1963	234.688
1964	267.691
1965	245.689
1966	308.028
1967	322.696
1968	451.041
1969	498.712
1970	377.701
1971	403.37
1972	374.034
1973	359.366
1974	370.367
1975	337.364
1976	528.048
1977	300.694
1978	238.355
1979	275.025
1980	275.025
1981	319.029
1982	1169.773
1983	971.755
1984	971.755
1985	1081.765
1986	865.412
1987	1133.103
1988	1290.784
1989	1272.449
1990	971.755
1991	1041.428
1992	1243.113
1993	1114.768
1994	1734.491
1995	1147.771
1996	1320.12
1997	1914.174
1998	355.699
1999	363.033
2000	557.384
2001	766.403
2002	575.719
2003	883.747
2004	913.083
2005	887.414
2006	1023.093
2007	1122.102
2008	1210.11
2009	1576.81
2010	1738.158
2011	1932.509
2012	2478.892
2013	2533.897
2014	2405.552
2015	2357.881
2016	2321.211