Year	kt
1990	6269
1991	6017.7
1992	6088.8
1993	5991.3
1994	6107
1995	6571.2
1996	7198.2
1997	6797.8
1998	7411.2
1999	7712.5
2000	8630.2
2001	7879.7
2002	7664.8
2003	6837
2004	7662.7
2005	8707.6
2006	9765.4
2007	9868.9
2008	10411.7
2009	12424.4
2010	13424.4
2011	13963.9
2012	12981.3
2013	14387.7
2014	16700
2015	18090.3
2016	19310.1
2017	20097.2
2018	19253.9
2019	19481.9
2020	19446.8