Forests cover about 16,879,000 hectares (41,708,000 acres), or 79% of the total land area. Commercial exploitation, however, is confined to a relatively small section in the northeast. The government-operated timber plant buys lumber from private sawmills and processes it with a view to standardizing and raising the quality of timber for export. Only about 20% of the forest area is reasonably accessible for timber exploitation. Green-heart is the most important timber produced and exported. Timber production was about 1,118,900 cu m (39.5 million cu ft) in 2000. Exports of forestry products amounted to US $38.4 million that year.