Year	kt
1960	14895.354
1961	11551.05
1962	8049.065
1963	13124.193
1964	11224.687
1965	13571.567
1966	10619.632
1967	13050.853
1968	13498.227
1969	16068.794
1970	17176.228
1971	10663.636
1972	13963.936
1973	13384.55
1974	31147.498
1975	32174.258
1976	26340.061
1977	30040.064
1978	35826.59
1979	38829.863
1980	49830.863
1981	53409.855
1982	53424.523
1983	52320.756
1984	48694.093
1985	58165.954
1986	59200.048
1987	58451.98
1988	61385.58
1989	60780.525
1990	68407.885
1991	60479.831
1992	73831.378
1993	69302.633
1994	63494.105
1995	60014.122
1996	46717.58
1997	55547.716
1998	77505.712
1999	90604.236
2000	84861.714
2001	100761.826
2002	125657.089
2003	127787.616
2004	87630.299
2005	95650.028
2006	98209.594
2007	85760.129
2008	102356.971
2009	105096.22
2010	113963.026
2011	100926.841
2012	115404.157
2013	103765.099
2014	104230.808
2015	88965.087
2016	76973.997