Year	kt
1960	36.67
1961	47.671
1962	102.676
1963	84.341
1964	91.675
1965	150.347
1966	348.365
1967	564.718
1968	990.09
1969	1257.781
1970	462.042
1971	425.372
1972	374.034
1973	330.03
1974	429.039
1975	707.731
1976	403.37
1977	465.709
1978	491.378
1979	407.037
1980	143.013
1981	106.343
1982	293.36
1983	84.341
1984	146.68
1985	249.356
1986	249.356
1987	275.025
1988	286.026
1989	286.026
1990	282.359
1991	267.691
1992	264.024
1993	271.358
1994	267.691
1995	275.025
1996	293.36
1997	308.028
1998	319.029
1999	330.03
2000	344.698
2001	348.365
2002	370.367
2003	403.37
2004	421.705
2005	429.039
2006	443.707
2007	469.376
2008	480.377
2009	509.713
2010	524.381
2011	513.38
2012	524.381
2013	524.381
2014	528.048
2015	546.383
2016	557.384