Year	kt
1960	14.668
1961	14.668
1962	18.335
1963	18.335
1964	18.335
1965	22.002
1966	22.002
1967	33.003
1968	47.671
1969	47.671
1970	36.67
1971	179.683
1972	198.018
1973	909.416
1974	1052.429
1975	311.695
1976	95.342
1977	99.009
1978	69.673
1979	55.005
1980	29.336
1981	135.679
1982	220.02
1983	179.683
1984	77.007
1985	95.342
1986	172.349
1987	220.02
1988	337.364
1989	176.016
1990	205.352
1991	209.019
1992	198.018
1993	205.352
1994	194.351
1995	256.69
1996	242.022
1997	249.356
1998	231.021
1999	231.021
2000	234.688
2001	245.689
2002	256.69
2003	271.358
2004	267.691
2005	278.692
2006	289.693
2007	311.695
2008	348.365
2009	462.042
2010	619.723
2011	696.73
2012	715.065
2013	704.064
2014	1019.426
2015	1019.426
2016	1023.093