Year	kt
1990	2314.6
1991	2210.6
1992	2169.1
1993	2806.3
1994	2507
1995	2378.8
1996	2324.3
1997	2469.6
1998	2374.5
1999	2409.2
2000	2129.2
2001	2489.1
2002	2318.4
2003	2608
2004	2598
2005	2626.4
2006	2650.6
2007	2715.6
2008	2724.3
2009	2509.9
2010	2586.6
2011	2573.1
2012	2715.6
2013	2371.5
2014	2356.3
2015	1657.1
2016	1352.3
2017	1521.2
2018	1552.5
2019	1658.6
2020	1610.7