The National Forest Inventory, 2013-2017

Productive forest area, by development class. 1 000 hectares and per cent¹
	1 000 hectares
	Total	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.
2000-2004	3 337	111	802	722	663	1 039
2001-2005	3 362	94	803	727	685	1 053
2002-2006	3 368	94	802	742	673	1 056
2003-2007	3 378	93	793	741	679	1 072
2004-2008	3 391	91	789	748	679	1 084
2005-2009	3 519	95	784	759	730	1 151
2006-2010	3 513	92	779	762	714	1 166
2007-2011	3 510	77	767	783	702	1 180
2008-2012	3 507	74	762	787	711	1 174
2009-2013	3 500	69	745	785	714	1 187
2010-2014	3 499	59	740	786	718	1 196
2011-2015	3 483	61	725	786	718	1 193
2012-2016	3 488	66	711	789	718	1 203
2013-2017	3 483	70	687	792	733	1 201
	Per cent
2000-2004	100	3	24	22	20	31
2001-2005	100	3	24	22	20	31
2002-2006	100	3	24	22	20	31
2003-2007	100	3	23	22	20	32
2004-2008	100	3	23	22	20	32
2005-2009	100	3	22	21	21	33
2006-2010	100	3	22	22	20	33
2007-2011	100	2	22	22	20	34
2008-2012	100	2	22	22	20	34
2009-2013	100	2	21	22	20	34
2010-2014	100	2	21	22	21	34
2011-2015	100	2	21	23	21	34
2012-2016	100	2	20	23	21	35
2013-2017	100	2	20	23	21	35

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