Year	kt
1990	785.735
1991	806.39
1992	815.06
1993	813.92
1994	725.72
1995	952.5
1996	1048.41
1997	1110.09
1998	1263.27
1999	1290.6
2000	1297.6
2001	1303.9
2002	1486.2
2003	1567.2
2004	1629.6
2005	2024
2006	2399.5
2007	2868.2
2008	2971.8
2009	3357.3
2010	3332
2011	3744.2
2012	3777.1
2013	3694.3
2014	4112.2
2015	4712.1
2016	4946.3
2017	5172
2018	5866.6
2019	5943
2020	5674.6