Year	kt
1992	195506.105
1993	184219.079
1994	163808.557
1995	156848.591
1996	170614.509
1997	151923.81
1998	136258.386
1999	147809.436
2000	142616.964
2001	142653.634
2002	130919.234
2003	147853.44
2004	151571.778
2005	149822.619
2006	129742.127
2007	125580.082
2008	120974.33
2009	93475.497
2010	126540.836
2011	107303.754
2012	98554.292
2013	90365.881
2014	76599.963
2015	59691.426
2016	58638.997