Year	kt
1990	5365.69
1991	4803.48
1992	4530.7
1993	3210.8
1994	4696.41
1995	4507.9
1996	4307.1
1997	5248.1
1998	4767.34
1999	5305.12
2000	5690.74
2001	6254.93
2002	7713.9
2003	7931.9
2004	8827.8
2005	10496
2006	12900.25
2007	13969.9
2008	14959.56
2009	15490.3
2010	16427.4
2011	15936.6
2012	15806.3
2013	15853.2
2014	16658.5
2015	19259.2
2016	21503.1
2017	21579.5
2018	21670.3
2019	22131.5
2020	20796.1