Annual kt
1960 2522607.3952019243
1961 2265621.459189504
1962 2165470.5596357407
1963 2235126.943571282
1964 2289147.291371995
1965 2395062.16741269
1966 2489671.74154649
1967 2419543.793648817
1968 2474753.787879559
1969 2625745.847901665
1970 2898810.125513467
1971 3032442.3877190887
1972 3149877.5009094235
1973 3196954.9016239033
1974 3224228.569938839
1975 3483203.417753975
1976 3565470.765622634
1977 3739867.175769785
1978 3894170.677446979
1979 3988058.8941162415
1980 4102141.9481962896
1981 3955057.966740062
1982 4164316.246452053
1983 4299168.0806489745
1984 4506119.835002649
1985 4957706.10136244
1986 5141693.874512286
1987 5342682.765821422
1988 5530376.920091278
1989 5478612.808302268
1990 5202159.609458608
1991 5177789.04473822
1992 4679628.121065807
1993 4729764.8056906415
1994 4799591.248472536
1995 5010053.8880419275
1996 5147320.35290511
1997 5029602.9580546925
1998 4799594.594117269
1999 4789046.657972696
2000 4843468.932023842
2001 4889567.132052296
2002 5271046.863429446
2003 5961881.771588313
2004 6591988.072317464
2005 7273534.70443378
2006 7938742.912866774
2007 8114968.668687539
2008 9088704.573527751
2009 8885064.8991222
2010 9944722.791353123
2011 10965449.188310789
2012 11345846.753986659
2013 11191020.09388603
2014 11215241.65643852
2015 11189098.165553058
2016 10970530.1642917