Year	kt
1990	3567900.8999999994
1991	3530556.1000000006
1992	3414360
1993	3350884.4099999997
1994	3340150.1000000006
1995	3391251.7199999993
1996	3490934.1999999997
1997	3421979.1000000006
1998	3413106.8
1999	3355112.5999999996
2000	3364061.4699999993
2001	3421057.1999999997
2002	3412869.0000000005
2003	3502699.1
2004	3507059.0999999996
2005	3489983.9000000004
2006	3498536.6999999997
2007	3456870.4
2008	3378385.8
2009	3131197.5
2010	3215802.6999999997
2011	3121388.9
2012	3061105
2013	2984329.5
2014	2839976.1
2015	2897317.9
2016	2907403.999999999
2017	2932145.4999999995
2018	2867932
2019	2729768.4369999995
2020	2465025.4199999995