Year	kt
1990	330.11
1991	273.51
1992	282.61
1993	287.29
1994	280.34
1995	302.07
1996	973.49
1997	1236.54
1998	1214.7
1999	1340.5
2000	1424.5
2001	1735.1
2002	2177.3
2003	2443.2
2004	2646.4
2005	2899.6
2006	3471.4
2007	3998.2
2008	4017.6
2009	4417.2
2010	4825.1
2011	4652.6
2012	4444.7
2013	4676.4
2014	5186.1
2015	5505.6
2016	6739
2017	6876.2
2018	7604
2019	7475.5
2020	7980.4