Year	kt
1990	148342.9
1991	162314.5
1992	171415.6
1993	185087.3
1994	199175.8
1995	223678.8
1996	236717.1
1997	261157
1998	262705.1
1999	279482.9
2000	280635.7
2001	302055
2002	305633
2003	333878.1
2004	341235.4
2005	342148.1
2006	364467
2007	379956.6
2008	376137.8
2009	391082.7
2010	415536.6
2011	475800.9
2012	481791.3
2013	448400.2
2014	484640.1
2015	489052.8
2016	483978.7
2017	515395.7
2018	568007.6
2019	605290.6
2020	563197