Year	kt
1990	7860.7
1991	8229.6
1992	9620.4
1993	9520.4
1994	11138.3
1995	11844.7
1996	12728.5
1997	14502.8
1998	16616.1
1999	17794
2000	18670.6
2001	18983.7
2002	20884.1
2003	18725.2
2004	17282.2
2005	18690.8
2006	20368.5
2007	20626.8
2008	20581.3
2009	19657.2
2010	20680.8
2011	20913.9
2012	21681.5
2013	21287.2
2014	21450.7
2015	23590.5
2016	24593.5
2017	23551.3
2018	25366
2019	25775.2
2020	22881.3