Year	kt
1990	2665961.5560000003
1991	2823141.8400000012
1992	2950892.095028001
1993	3212685.429589
1994	3367636.9864449995
1995	3749195.491962
1996	3774435.9313500007
1997	3886600.519182999
1998	3969055.6281270003
1999	3925971.507523
2000	4141518.4199999995
2001	4366771.71
2002	4664764.44
2003	5344565
2004	6090553.99
2005	6834676.03
2006	7477420.9
2007	8074794.430000001
2008	8311664.1
2009	8816028.69
2010	9654293.100000003
2011	10515988.700000001
2012	10809799.300000003
2013	11252643.83
2014	11372410.300000003
2015	11254077.300000003
2016	11291996
2017	11608128.399999997
2018	12214599.399999999
2019	12535996.700000001
2020	12660698.2