Year	kt
1990	12968.1
1991	14758.07
1992	12858.42
1993	11852.58
1994	10323.84
1995	10275.47
1996	8690.27
1997	8518.94
1998	8548.7
1999	8606.58
2000	8996.67
2001	8970.4
2002	9604.46
2003	9312.16
2004	9561.28
2005	11058.15
2006	12419.2
2007	13021.5
2008	12974.4
2009	13638.49
2010	14311.1
2011	15729.4
2012	17141.5
2013	18384.13
2014	18122
2015	17300.6
2016	18172.8
2017	19575.5
2018	21545.7
2019	23146.9
2020	21184.7