Costa Rica's forestland has declined from about 75% of the total land area in 1940 to 39% in 2000. About 18% of the area still forested is lightly exploited, while 82% is virgin forest. Varieties of commercial woods include laurel, cedar, oak, quina, espavel, campana, cristobal, pochote, maca wood, cedro macho, cedar, and caoba (mahogany). In the Golfo Dulce rain forest of the southern Pacific coast, 135 families of trees embracing some 1,315 species in 661 genera have been identified. Forest products include rubber, chicle, ipecac, roots, medicinal plants, seeds, and other plant products. Although lumber exports have declined, overall timber output increased to 5.2 million cu m (184 million cu ft) of roundwood cut in 2000, of which about 67% was used for fuel. Forestry product exports in 2000 totaled $21.7 million.