Annual kt
1963 2255.366302614582
1964 2426.2273861459894
1965 1771.2598992755932
1966 2141.4589135936435
1967 1925.0348744538603
1968 2005.0485489421626
1969 2616.8609460514026
1970 2960.550056477508
1971 3937.066567252812
1972 4076.5689259349983
1973 4784.414227396462
1974 4081.7356799602653
1975 5502.593036908458
1976 7192.1216031704935
1977 14119.979372218722
1978 10969.539937976895
1979 9058.416124420013
1980 7551.269702346701
1981 15517.159566798917
1982 15662.276623535845
1983 8320.74636367799
1984 8507.263716786589
1985 11781.679471359746
1986 11817.946734464193
1987 13175.378582087877
1988 15377.319556286595
1989 15874.02974383825
1990 17788.43359169358
1991 19956.366597778404
1992 21865.59638118007
1993 24007.659064996576
1994 25280.47892059769
1995 25156.301373709768
1996 26576.747195956883
1997 27487.68527761537
1998 27842.796733177147
1999 30225.64606542502
2000 32367.702072787342
2001 29235.511645554103
2002 30089.13842900232
2003 39035.860781490024
2004 40143.32938636763
2005 56388.86285174559
2006 57100.590133821825
2007 56885.746776294895
2008 60594.46055967756
2009 58714.25078356468
2010 60049.19972460481
2011 69972.00681804049
2012 70842.0714276209
2013 70451.71811629564
2014 75643.8874621161
2015 76415.14002933943
2016 77177.03396611645