Year	kt
1990	2705.4
1991	2791.5
1992	2772.1
1993	2957.3
1994	3093.6
1995	3365.1
1996	4053.6
1997	4972.6
1998	4989.7
1999	6831.4
2000	6489.4
2001	6494.3
2002	6838.9
2003	5307.6
2004	5466.1
2005	5876.5
2006	5698.7
2007	5657.8
2008	6474.7
2009	6031.2
2010	6350.6
2011	6118.3
2012	8037.7
2013	8692.4
2014	9196.9
2015	9805.7
2016	9593.5
2017	10563.8
2018	10194.8
2019	10838.9
2020	10894.9