Year	kt
1990	7966959.675113003
1991	7846626.453843
1992	7499646.758356002
1993	7110491.562417001
1994	6738164.877635
1995	6687518.121854001
1996	6714980.890606
1997	6490296.501428997
1998	6487492.669298
1999	6429218.086504999
2000	6507573.874390999
2001	6566293.031269999
2002	6578328.567749002
2003	6788126.321864
2004	6793339.070516997
2005	6788006.384321999
2006	6908752.5068
2007	6907496.871924999
2008	6856012.433867
2009	6339923.148672998
2010	6579733.278438999
2011	6594980.407993
2012	6524680.837447
2013	6386728.464887001
2014	6104308.523170004
2015	6073951.401794
2016	6099478.730256
2017	6166584.297397002
2018	6177967.890403001
2019	6034379.546715998
2020	5641772.700491999