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Productive forest area, by development class. 1 000 hectares and per cent1
1 000 hectares
Development class I
Development class II
Development class III
Development class IV
Development class V
1Refer to the counties Østfold, Akershus, Oslo, Hedmark, Oppland, Buskerud og Vestfold.These are the only counties that are included in all the inventory cycles presented. As from the inventory cycle 2006-2010, areas above the coniferous forest line are also included.