Year	kt
1992	935.085
1993	520.714
1994	113.677
1995	51.338
1996	22.002
1997	62.339
1998	47.671
1999	33.003
2000	44.004
2001	66.006
2002	80.674
2003	106.343
2004	161.348
2005	168.682
2006	176.016
2007	315.362
2008	341.031
2009	308.028
2010	337.364
2011	370.367
2012	704.064
2013	876.413
2014	1481.468
2015	1760.16
2016	2233.203