Year	kt
1990	18777.4
1991	17201.5
1992	13974.8
1993	11757.31
1994	10223.5
1995	8996.82
1996	9009.4
1997	8528.6
1998	8132.5
1999	7548.9
2000	6929.57
2001	7357.2
2002	7352.2
2003	7593.2
2004	7616.5
2005	7715
2006	8199.9
2007	8531.8
2008	8105.9
2009	7364.1
2010	8518.1
2011	7897.3
2012	7570.7
2013	7452.4
2014	7282.3
2015	7315.9
2016	7145.3
2017	7116.7
2018	7785.2
2019	7569.1
2020	6928.3