Annual kt
1960 2222014.9450495956
1961 2323411.31275544
1962 2476918.9031692008
1963 2640332.2053810568
1964 2827084.371250475
1965 3040207.761531976
1966 3249073.46977448
1967 3484442.423577562
1968 3779839.7433374347
1969 4092552.46185474
1970 4724942.014472516
1971 4937941.634927302
1972 5341893.3440380385
1973 5660852.31314356
1974 5463852.005622137
1975 5253199.886214046
1976 5484942.384094378
1977 5648735.247108157
1978 5774765.935991184
1979 5786643.713694936
1980 5378013.505134375
1981 4980176.02546336
1982 4749196.77484777
1983 4662768.304852665
1984 4719141.335260471
1985 4618941.409212873
1986 4750814.033916847
1987 4831854.39078896
1988 5021651.294395569
1989 5127462.119254246
1990 4910980.4410078805
1991 4877414.064002762
1992 4986562.615999996
1993 5003731.509999997
1994 5051545.522999995
1995 5078200.945999997
1996 5187987.258999997
1997 5210154.2739999965
1998 5216025.140999997
1999 5255254.706999998
2000 5271275.829999998
2001 5278059.7799999975
2002 5247388.991999996
2003 5323926.6159999985
2004 5361065.992
2005 5352133.179999998
2006 5258173.638999999
2007 5157323.805
2008 5000563.221999999
2009 4806571.587999999
2010 4804774.757999999
2011 4657808.732
2012 4564135.216999998
2013 4547061.664999999
2014 4515969.172
2015 4743889.707573113
2016 4703527.153830098