Year	kt
1990	407.037
1991	407.037
1992	407.037
1993	410.704
1994	407.037
1995	425.372
1996	454.708
1997	465.709
1998	491.378
1999	513.38
2000	524.381
2001	524.381
2002	531.715
2003	535.382
2004	561.051
2005	575.719
2006	546.383
2007	539.049
2008	539.049
2009	517.047
2010	517.047
2011	491.378
2012	487.711
2013	476.71
2014	462.042
2015	465.709
2016	469.376