Year	kt
1990	75619.4
1991	75818
1992	78176.9
1993	78090.9
1994	79730.8
1995	82834.5
1996	82753.7
1997	83761.7
1998	87127.2
1999	87395.5
2000	94460.6
2001	96607.8
2002	96596.2
2003	100216.6
2004	99844.6
2005	101947.3
2006	100702.8
2007	104309.9
2008	100405.6
2009	94740.2
2010	87578.5
2011	84547.2
2012	80085.3
2013	72484.2
2014	69548.7
2015	68010.2
2016	66848.6
2017	66795.5
2018	65021.2
2019	59990.3
2020	51002.2