Year	kt
1990	33805.9
1991	34523.6
1992	36857.3
1993	40504.6
1994	43361.2
1995	46775.3
1996	48734.1
1997	50967.4
1998	51504.7
1999	52983.6
2000	56997.3
2001	57952.5
2002	61080.6
2003	62925.5
2004	63159.9
2005	61012.4
2006	64331
2007	66597.9
2008	66708
2009	65727.7
2010	70520.3
2011	69822.8
2012	76063.2
2013	67002.5
2014	64717.8
2015	66314.7
2016	65233
2017	65906.3
2018	61424.5
2019	62796.3
2020	58471.8