Year	kt
1990	65.5
1991	68.7
1992	70.3
1993	73.3
1994	74.9
1995	78
1996	79.6
1997	84.3
1998	92.2
1999	96.9
2000	104.9
2001	109.8
2002	109.7
2003	139.7
2004	153.2
2005	147
2006	172.1
2007	111.8
2008	114.1
2009	140.4
2010	167.8
2011	150
2012	160.1
2013	192.2
2014	171.9
2015	185.9
2016	217.9
2017	279
2018	302.7
2019	326.2
2020	328.2