Year	kt
1992	22618.056
1993	17297.239
1994	16684.85
1995	13318.544
1996	11745.401
1997	11070.673
1998	10608.631
1999	11697.73
2000	11430.039
2001	16589.508
2002	16633.512
2003	17066.218
2004	18639.361
2005	18547.686
2006	20483.862
2007	17594.266
2008	20755.22
2009	18804.376
2010	17982.968
2011	19039.064
2012	19849.471
2013	19933.812
2014	21202.594
2015	21950.662
2016	21525.29