Year	kt
1960	51.338
1961	102.676
1962	113.677
1963	113.677
1964	113.677
1965	128.345
1966	132.012
1967	161.348
1968	179.683
1969	209.019
1970	253.023
1971	256.69
1972	234.688
1973	253.023
1974	300.694
1975	348.365
1976	330.03
1977	407.037
1978	399.703
1979	480.377
1980	421.705
1981	440.04
1982	458.375
1983	487.711
1984	498.712
1985	517.047
1986	491.378
1987	498.712
1988	528.048
1989	579.386
1990	704.064
1991	656.393
1992	649.059
1993	583.053
1994	575.719
1995	572.052
1996	601.388
1997	590.387
1998	623.39
1999	630.724
2000	689.396
2001	762.736
2002	726.066
2003	733.4
2004	748.068
2005	722.399
2006	678.395
2007	689.396
2008	630.724
2009	575.719
2010	630.724
2011	568.385
2012	590.387
2013	678.395
2014	597.721
2015	608.722
2016	630.724