Year	kt
1990	82.6
1991	89.1
1992	89.2
1993	108.9
1994	122.3
1995	132.2
1996	135.4
1997	142.1
1998	171.2
1999	173.1
2000	155.6
2001	187.4
2002	196.7
2003	208.2
2004	228.3
2005	229.7
2006	227.7
2007	246
2008	229.2
2009	288.2
2010	233.6
2011	224.9
2012	240.8
2013	226.3
2014	267.5
2015	246.5
2016	255.2
2017	225.1
2018	252.3
2019	235.1
2020	219.8