Year	kt
1960	157.681
1961	176.016
1962	157.681
1963	150.347
1964	201.685
1965	179.683
1966	201.685
1967	212.686
1968	223.687
1969	198.018
1970	227.354
1971	231.021
1972	253.023
1973	425.372
1974	443.707
1975	454.708
1976	469.376
1977	454.708
1978	425.372
1979	462.042
1980	436.373
1981	388.702
1982	396.036
1983	451.041
1984	443.707
1985	451.041
1986	421.705
1987	572.052
1988	645.392
1989	781.071
1990	502.379
1991	539.049
1992	462.042
1993	539.049
1994	531.715
1995	531.715
1996	528.048
1997	524.381
1998	520.714
1999	513.38
2000	517.047
2001	528.048
2002	557.384
2003	561.051
2004	583.053
2005	583.053
2006	652.726
2007	729.733
2008	649.059
2009	476.71
2010	608.722
2011	443.707
2012	366.7
2013	509.713
2014	649.059
2015	557.384
2016	612.389