Year	kt
1990	58275.7
1991	62423.2
1992	57668
1993	57804
1994	58288.2
1995	61186.4
1996	64902.9
1997	64224.1
1998	64673.1
1999	63055.1
2000	63538.6
2001	67914.4
2002	69374.2
2003	74467.9
2004	75802.1
2005	76242.4
2006	74104.4
2007	71248
2008	70734.7
2009	64420.7
2010	69965.1
2011	68276
2012	65112
2013	65752.7
2014	62054.5
2015	63254.7
2016	63697.1
2017	65867.7
2018	63131.4
2019	64497.8
2020	59142.4