Table

Productive forest area, by development class. The National Forest Inventory. 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.
1986-1992	3 286	171	766	678	707	964
1994-1998	3 330	139	800	726	657	1 008
1998-2002	3 370	124	815	728	667	1 036
1999-2003	3 365	120	807	722	672	1 045
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
	Per cent
1986-1992	100	5	23	21	22	29
1994-1998	100	4	24	22	20	30
1998-2002	100	4	24	21	20	31
1999-2003	100	4	24	21	20	31
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