Year	kt
1960	11092.675
1961	11576.719
1962	12713.489
1963	12178.107
1964	11840.743
1965	10623.299
1966	9933.903
1967	12236.779
1968	11378.701
1969	14891.687
1970	16655.514
1971	14495.651
1972	14055.611
1973	15592.084
1974	14132.618
1975	10234.597
1976	21862.654
1977	11419.038
1978	9724.884
1979	10201.594
1980	10498.621
1981	9999.909
1982	11180.683
1983	5746.189
1984	14348.971
1985	16794.86
1986	179.683
1987	447.374
1988	612.389
1989	649.059
1990	487.711
1991	531.715
1992	539.049
1993	649.059
1994	660.06
1995	707.731
1996	726.066
1997	759.069
1998	806.74
1999	810.407
2000	2379.883
2001	2409.219
2002	2438.555
2003	2563.233
2004	2618.238
2005	2720.914
2006	2717.247
2007	2823.59
2008	2658.575
2009	2629.239
2010	2508.228
2011	2500.894
2012	1349.456
2013	861.745
2014	872.746
2015	898.415
2016	883.747