Year	kt
1992	13281.874
1993	13575.234
1994	13259.872
1995	15005.364
1996	17267.903
1997	17564.93
1998	17601.6
1999	17696.942
2000	17176.228
2001	18397.339
2002	17777.616
2003	17960.966
2004	17836.288
2005	17641.937
2006	17392.581
2007	16578.507
2008	16428.16
2009	15584.75
2010	18481.68
2011	15595.751
2012	15702.094
2013	15911.113
2014	14158.287
2015	14847.683
2016	16068.794