Year	kt
1990	2516.9
1991	2257.2
1992	2657.6
1993	2696.5
1994	2914.6
1995	3184.4
1996	3483.3
1997	3604.6
1998	5438.7
1999	5818.9
2000	4949.5
2001	5444.5
2002	6669.7
2003	6381
2004	5924.8
2005	6331.1
2006	7798.5
2007	8418.5
2008	7966.9
2009	9320.3
2010	10382.6
2011	10803.1
2012	12876.5
2013	13899.7
2014	13366.7
2015	14320.7
2016	14545.3
2017	15135
2018	16774.9
2019	18039.1
2020	19401.16