Year	kt
1990	100313.9
1991	105906.6
1992	107921.1
1993	110256.5
1994	111909.9
1995	112886.7
1996	122545.9
1997	126118.7
1998	132669.9
1999	134502
2000	132265.5
2001	125255.2
2002	117462.1
2003	127653.5
2004	141376.4
2005	145995.4
2006	154917.5
2007	162820.2
2008	167231.8
2009	156567.5
2010	167226.3
2011	176641.6
2012	177955.3
2013	183255.7
2014	179600.7
2015	185550
2016	183158.7
2017	179267.3
2018	176894.6
2019	168162
2020	154535.9