Year	kt
1992	3817.347
1993	3439.646
1994	3424.978
1995	1246.78
1996	1855.502
1997	1943.51
1998	1939.843
1999	1917.841
2000	1866.503
2001	1228.445
2002	1987.514
2003	2409.219
2004	2365.215
2005	2321.211
2006	2225.869
2007	2306.543
2008	3193.957
2009	2753.917
2010	2684.244
2011	2867.594
2012	4019.032
2013	3578.992
2014	4506.743
2015	4341.728
2016	3483.65