Year	kt
1990	2072.2
1991	2020.3
1992	2474.6
1993	2817.6
1994	3335.1
1995	3781.2
1996	3723
1997	4107.2
1998	4266.9
1999	4266.3
2000	3524.3
2001	3614.8
2002	3775.4
2003	3937.6
2004	3973.7
2005	3698.5
2006	3954.6
2007	3720.5
2008	4323.2
2009	4567.9
2010	5043.3
2011	5218
2012	5177.4
2013	5301.2
2014	5628
2015	6367.5
2016	7192.6
2017	7920.9
2018	8360.1
2019	8101.6
2020	7575.7