Year	kt
1990	3260.3
1991	3384.5
1992	3585.4
1993	3928.1
1994	4265.1
1995	4600.7
1996	4827.2
1997	5225.2
1998	4517.9
1999	4433
2000	4717.9
2001	4708.8
2002	4620.1
2003	5515.5
2004	5103
2005	4991.3
2006	7520.8
2007	7143.2
2008	7912.5
2009	7874.3
2010	7170.8
2011	7332.7
2012	7299.5
2013	7208.8
2014	7080.3
2015	6397.7
2016	6968.5
2017	7290.2
2018	7540
2019	7057.8
2020	9588