Year	kt
1990	1117.23
1991	936.09
1992	1097.38
1993	1288.573
1994	1096.88
1995	1172.64
1996	1161.72
1997	1287.66
1998	1241.68
1999	1233.76
2000	1426.9
2001	1411.5
2002	1570.9
2003	1904.6
2004	1910
2005	1709.1
2006	1861
2007	2230.7
2008	2238.7
2009	2494.3
2010	2680.6
2011	3294.3
2012	3640.8
2013	4150.5
2014	4823.3
2015	5478.3
2016	7243.8
2017	7162.3
2018	6875.1
2019	7530.2
2020	6945.5