Year	kt
1990	4381209.140257
1991	4240031.740692
1992	3991060.703865
1993	3675716.2999969996
1994	3309124.2225450003
1995	3222587.43624
1996	3149439.974239
1997	2992756.7269379995
1998	2952683.9745850004
1999	2923459.7701080004
2000	2980028.252393
2001	2973900.7182199997
2002	3000972.5994760003
2003	3125391.3133480004
2004	3125612.0976870004
2005	3139915.8000000007
2006	3268927.1999999997
2007	3323990.5999999996
2008	3355739.2600000002
2009	3101978.3499999996
2010	3251419.1
2011	3411004.8000000007
2012	3362262.5000000005
2013	3292199.8000000003
2014	3184532.8000000003
2015	3118703.6999999997
2016	3159626.5
2017	3237220.9000000004
2018	3316919.4999999995
2019	3307604.5999999996
2020	3194229.4999999995