Year	kt
1990	33488.3
1991	25505.9
1992	20072.9
1993	16093.7
1994	10443.86
1995	8177.32
1996	6363.3
1997	5518.89
1998	4990.37
1999	4522.2
2000	4772.8
2001	3516.2
2002	2958.4
2003	3157.2
2004	3373.1
2005	4243.1
2006	4701.3
2007	5626.6
2008	4838.8
2009	5624.3
2010	5322.1
2011	6521.8
2012	7193
2013	8024
2014	8654
2015	9399.4
2016	9813.6
2017	9907.1
2018	9725.2
2019	10549.6
2020	10255