Year	kt
1990	2326.3
1991	2334.7
1992	2568.3
1993	2505.6
1994	2606.2
1995	2761.2
1996	2927.3
1997	3215
1998	3597.4
1999	3960.7
2000	4063.7
2001	4455.4
2002	4579.6
2003	4486.4
2004	5390.2
2005	5666.2
2006	5569.4
2007	6202.1
2008	6436.1
2009	6666.2
2010	7026.2
2011	7571.4
2012	7454.6
2013	8013
2014	8572
2015	9285.5
2016	10132.8
2017	9800.8
2018	10176.6
2019	12297.8
2020	10680.2