Year	kt
1990	139197.9
1991	143796.1
1992	149797.2
1993	155579.5
1994	153823.1
1995	168150.5
1996	185337.7
1997	193428.4
1998	193687.6
1999	192651.4
2000	216396.5
2001	197771.1
2002	208107.6
2003	219158.6
2004	224601.2
2005	235003
2006	261083.6
2007	288967.8
2008	287205
2009	288307.2
2010	297814
2011	318641.2
2012	329797.8
2013	319088.6
2014	341671.5
2015	353413.8
2016	376399
2017	418098.2
2018	414111.9
2019	398772.9
2020	407406.2