Year	kt
1960	44.004
1961	91.675
1962	84.341
1963	88.008
1964	110.01
1965	102.676
1966	102.676
1967	102.676
1968	102.676
1969	121.011
1970	143.013
1971	150.347
1972	161.348
1973	168.682
1974	205.352
1975	220.02
1976	209.019
1977	249.356
1978	348.365
1979	407.037
1980	432.706
1981	557.384
1982	575.719
1983	594.054
1984	465.709
1985	476.71
1986	480.377
1987	517.047
1988	553.717
1989	821.408
1990	583.053
1991	627.057
1992	630.724
1993	627.057
1994	645.392
1995	612.389
1996	693.063
1997	788.405
1998	843.41
1999	843.41
2000	990.09
2001	971.755
2002	990.09
2003	1063.43
2004	1089.099
2005	1111.101
2006	1345.789
2007	1580.477
2008	1554.808
2009	1613.48
2010	1811.498
2011	1906.84
2012	2368.882
2013	2640.24
2014	2757.584
2015	3197.624
2016	3267.297