Year	kt
1960	223.687
1961	293.36
1962	264.024
1963	330.03
1964	315.362
1965	344.698
1966	388.702
1967	418.038
1968	542.716
1969	407.037
1970	381.368
1971	469.376
1972	553.717
1973	557.384
1974	557.384
1975	506.046
1976	220.02
1977	722.399
1978	392.369
1979	572.052
1980	564.718
1981	528.048
1982	517.047
1983	363.033
1984	568.385
1985	509.713
1986	326.363
1987	234.688
1988	546.383
1989	473.043
1990	553.717
1991	546.383
1992	480.377
1993	498.712
1994	502.379
1995	502.379
1996	517.047
1997	520.714
1998	528.048
1999	539.049
2000	531.715
2001	539.049
2002	539.049
2003	531.715
2004	583.053
2005	608.722
2006	627.057
2007	638.058
2008	660.06
2009	575.719
2010	663.727
2011	707.731
2012	568.385
2013	553.717
2014	506.046