Year	kt
1960	88.008
1961	88.008
1962	73.34
1963	73.34
1964	73.34
1965	88.008
1966	84.341
1967	91.675
1968	183.35
1969	187.017
1970	209.019
1971	183.35
1972	168.682
1973	161.348
1974	113.677
1975	102.676
1976	128.345
1977	128.345
1978	146.68
1979	102.676
1980	106.343
1981	135.679
1982	143.013
1983	146.68
1984	150.347
1985	161.348
1986	161.348
1987	260.357
1988	231.021
1989	249.356
1990	198.018
1991	205.352
1992	216.353
1993	223.687
1994	234.688
1995	234.688
1996	234.688
1997	245.689
1998	249.356
1999	264.024
2000	267.691
2001	245.689
2002	245.689
2003	234.688
2004	234.688
2005	234.688
2006	249.356
2007	253.023
2008	253.023
2009	253.023
2010	264.024
2011	278.692
2012	293.36
2013	286.026
2014	289.693
2015	293.36
2016	297.027