Year	kt
1992	3689.002
1993	2431.221
1994	825.075
1995	1397.127
1996	1543.807
1997	1675.819
1998	1708.822
1999	1411.795
2000	1206.443
2001	1085.432
2002	1004.758
2003	1246.78
2004	1543.807
2005	1371.458
2006	1272.449
2007	2236.87
2008	2423.887
2009	3124.284
2010	2757.584
2011	3641.331
2012	4675.425
2013	4800.103
2014	4404.067
2015	4836.773
2016	5115.465