Year	kt
1990	11285
1991	11753.4
1992	11435.5
1993	11645.3
1994	10810.6
1995	8659.9
1996	8736.8
1997	8242.2
1998	7565.5
1999	7920.3
2000	8556.7
2001	9118.5
2002	9818.3
2003	10241.6
2004	11659.8
2005	11912.9
2006	11717.2
2007	11114.4
2008	11022.5
2009	10442.9
2010	11029.1
2011	10906.8
2012	10698
2013	10173.3
2014	9643.2
2015	9133.4
2016	8845.9
2017	9006.5
2018	9320.8
2019	9500.3
2020	7853.1