Year	kt
1990	8591.3
1991	8383.7
1992	8332.4
1993	8639.7
1994	8350.8
1995	8305.7
1996	9862.5
1997	8786.1
1998	9651.4
1999	8879.5
2000	8522.1
2001	8670.6
2002	8128.5
2003	8829.1
2004	8542.6
2005	8881.8
2006	8852.9
2007	9328.1
2008	9120
2009	8512.3
2010	8329.6
2011	9157.1
2012	8798.9
2013	7862.2
2014	7442.9
2015	7142.1
2016	6962.7
2017	7436.2
2018	6950.6
2019	7956.1
2020	6796.7