Year	kt
1990	419492.2
1991	413298.6
1992	426367.3
1993	422047.8
1994	436764.6
1995	448046
1996	461700.7
1997	476815.9
1998	484791.8
1999	494278.5
2000	514215.1
2001	506615.9
2002	524353.4
2003	544541.8
2004	536417.3
2005	549032.7
2006	540525.6
2007	571632
2008	550553.2
2009	521399.4
2010	537091.5
2011	549369.9
2012	546291.6
2013	555742.4
2014	561760.5
2015	558747.2
2016	556874.1
2017	568175.9
2018	579573.9
2019	566001.8
2020	516873.7