Year	kt
1990	594.1
1991	599.6
1992	610.8
1993	623.6
1994	625.8
1995	639.72
1996	724.9
1997	827.85
1998	879.32
1999	933.39
2000	1048.93
2001	1024.23
2002	1027.23
2003	1102.48
2004	1133.84
2005	1151.29
2006	1400.48
2007	1682.82
2008	1909.6
2009	1930.1
2010	2094.3
2011	2200.4
2012	2693
2013	2947
2014	2997
2015	3801.8
2016	3997.8
2017	4625.2
2018	5147.7
2019	5646.5
2020	5456.7