Year	kt
1990	3839.2
1991	3985.4
1992	5248.3
1993	5091.3
1994	5766.8
1995	5816.4
1996	8355.3
1997	8340.5
1998	8608.4
1999	9496.3
2000	10928.9
2001	10848
2002	11385.2
2003	12412.3
2004	12868.2
2005	13984.4
2006	12404.9
2007	13591.6
2008	12810.7
2009	12291.4
2010	13071.8
2011	15410.2
2012	17440.4
2013	14448.4
2014	17458.3
2015	19240.9
2016	23167.6
2017	23140.5
2018	21690.3
2019	23427.9
2020	21846.3