Year	kt
1960	3333.303
1961	3736.673
1962	3824.681
1963	4697.427
1964	6120.223
1965	6057.884
1966	7205.655
1967	8016.062
1968	8001.394
1969	8984.15
1970	13773.252
1971	14994.363
1972	15925.781
1973	15375.731
1974	15342.728
1975	15199.715
1976	18819.044
1977	17843.622
1978	19211.413
1979	22313.695
1980	23047.095
1981	26149.377
1982	25346.304
1983	30560.778
1984	25713.004
1985	27722.52
1986	27990.211
1987	28081.886
1988	30469.103
1989	32372.276
1990	38338.485
1991	42229.172
1992	45602.812
1993	54304.603
1994	55199.351
1995	61979.634
1996	69566.657
1997	70828.105
1998	59750.098
1999	52867.139
2000	56508.47
2001	64491.529
2002	61972.3
2003	63497.772
2004	68686.577
2005	69724.338
2006	62988.059
2007	69731.672
2008	71227.808
2009	65356.941
2010	74392.429
2011	72584.598
2012	75334.848
2013	86746.552
2014	89628.814
2015	77054.671
2016	87747.643