Year	kt
1960	55.005
1961	51.338
1962	84.341
1963	91.675
1964	99.009
1965	106.343
1966	84.341
1967	117.344
1968	124.678
1969	161.348
1970	124.678
1971	150.347
1972	121.011
1973	161.348
1974	150.347
1975	183.35
1976	183.35
1977	198.018
1978	194.351
1979	201.685
1980	209.019
1981	209.019
1982	205.352
1983	205.352
1984	216.353
1985	179.683
1986	187.017
1987	198.018
1988	66.006
1989	102.676
1990	377.701
1991	385.035
1992	407.037
1993	403.37
1994	407.037
1995	421.705
1996	436.373
1997	451.041
1998	462.042
1999	476.71
2000	487.711
2001	502.379
2002	509.713
2003	744.401
2004	748.068
2005	766.403
2006	792.072
2007	854.411
2008	927.751
2009	942.419
2010	997.424
2011	821.408
2012	850.744
2013	876.413
2014	902.082
2015	902.082
2016	916.75