Year	kt
1990	4591.2
1991	5109
1992	5479.7
1993	5735.8
1994	5977.9
1995	5848
1996	6211.3
1997	6304.9
1998	6610
1999	6871.1
2000	7127.7
2001	6992.1
2002	7168.5
2003	7834.1
2004	7778.8
2005	7900.8
2006	7999.4
2007	8307.1
2008	8490.7
2009	8276.1
2010	7898.4
2011	7634.6
2012	7098.8
2013	6427.7
2014	6811.8
2015	6851.9
2016	7219.2
2017	7361.2
2018	7198.6
2019	7191
2020	6771.8