Year	kt
1990	274.1
1991	288.2
1992	304.5
1993	305.8
1994	295.5
1995	315.8
1996	296
1997	331.8
1998	393.8
1999	393.3
2000	373.4
2001	376.5
2002	399.6
2003	414.4
2004	395.8
2005	429.3
2006	432.6
2007	470.2
2008	474.3
2009	465.5
2010	519.1
2011	474.9
2012	492.6
2013	558.79
2014	402.17
2015	446.55
2016	395.47
2017	403.4
2018	414.9
2019	428.27
2020	427.7