Year	kt
1990	84.1
1991	90.4
1992	76.9
1993	86.3
1994	92.3
1995	99
1996	81
1997	94.2
1998	94.9
1999	113.9
2000	102.9
2001	94.7
2002	101.7
2003	123.5
2004	117.4
2005	117.2
2006	134.9
2007	119.8
2008	127.3
2009	138.1
2010	117.7
2011	107.4
2012	109.3
2013	114.7
2014	113.4
2015	109.9
2016	123.9
2017	132.9
2018	134.2
2019	161.5
2020	118.1