Year	kt
1960	102.676
1961	176.016
1962	157.681
1963	187.017
1964	223.687
1965	267.691
1966	282.359
1967	293.36
1968	440.04
1969	330.03
1970	304.361
1971	399.703
1972	535.382
1973	517.047
1974	539.049
1975	506.046
1976	209.019
1977	722.399
1978	385.035
1979	564.718
1980	557.384
1981	520.714
1982	513.38
1983	359.366
1984	564.718
1985	509.713
1986	326.363
1987	234.688
1988	546.383
1989	473.043
1990	348.365
1991	348.365
1992	326.363
1993	322.696
1994	297.027
1995	322.696
1996	363.033
1997	385.035
1998	359.366
1999	374.034
2000	454.708
2001	407.037
2002	377.701
2003	429.039
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
2015	509.713
2016	509.713