Year	kt
1990	2546780.3559999997
1991	2710332.240000001
1992	2851300.595028001
1993	3121380.6295890003
1994	3284135.7864449993
1995	3671061.591962
1996	3705877.5313500003
1997	3820665.019182999
1998	3908236.528127
1999	3859449.507523
2000	4069783.519999999
2001	4292467.21
2002	4593644.4399999995
2003	5271895.5
2004	6016294.29
2005	6757060.330000001
2006	7398527.900000001
2007	8009202.130000001
2008	8238874.9
2009	8760812.19
2010	9602646.000000002
2011	10478929.9
2012	10771358.000000002
2013	11225062.030000001
2014	11341237.6
2015	11229030.3
2016	11263921
2017	11553898.399999997
2018	12164532.099999998
2019	12480501.700000001
2020	12608302.4