Year	kt
1990	1004.32
1991	1000.03
1992	925.75
1993	876.84
1994	929.58
1995	946.6
1996	980.47
1997	1068.52
1998	1137.1
1999	1208.7
2000	1188.1
2001	1216.8
2002	1206.3
2003	1249.9
2004	1280.2
2005	1326.1
2006	1347.6
2007	1367
2008	1619
2009	1599.7
2010	1481.5
2011	1516.25
2012	1467.62
2013	1439.47
2014	1282.07
2015	1269.57
2016	1290.77
2017	1179.97
2018	1270.17
2019	1167.27
2020	1096.07