Year	kt
1990	28603.5
1991	28821.6
1992	26342.3
1993	30590.9
1994	38651.8
1995	43491.8
1996	45439.7
1997	42204.9
1998	41902.4
1999	43223.2
2000	44724.9
2001	44456.9
2002	45596.1
2003	48931.5
2004	48469
2005	53004.1
2006	52930.4
2007	49395.5
2008	53275.9
2009	56404
2010	59559.6
2011	41506.4
2012	58315.1
2013	59767.3
2014	59289.1
2015	51331.2
2016	48694.8
2017	52095.1
2018	54100.1
2019	54692.7
2020	44467