Year	kt
1986	179.683
1987	447.374
1988	612.389
1989	649.059
1990	1639.149
1991	1683.153
1992	1463.133
1993	1595.145
1994	1613.48
1995	1668.485
1996	1690.487
1997	1745.492
1998	1796.83
1999	1807.831
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