Year	kt
1990	340.3
1991	441.6
1992	382.5
1993	405.7
1994	402.7
1995	405.2
1996	330.6
1997	419
1998	399.6
1999	374.4
2000	425.2
2001	481.4
2002	449.7
2003	450.2
2004	409.6
2005	435.3
2006	461.2
2007	491.6
2008	450.9
2009	532
2010	531.2
2011	573.4
2012	465.3
2013	457.4
2014	483.7
2015	675.1
2016	651.3
2017	643.1
2018	630
2019	736.2
2020	687.6