Year	kt
1990	5622.1
1991	7039.89
1992	7021.4
1993	10326.3
1994	11274.4
1995	13304.9
1996	14123.6
1997	16127.5
1998	16255.4
1999	17035
2000	15672.8
2001	16890.9
2002	16836.2
2003	17414.9
2004	17879.3
2005	17278.9
2006	16233.7
2007	15039.6
2008	18646
2009	21902.7
2010	20864.3
2011	21175.1
2012	23470.1
2013	23244.5
2014	25151
2015	27016.8
2016	27755.1
2017	29170.9
2018	27401.3
2019	26916.5
2020	21474.9