Finland's wet climate and rocky soils are ideal for forests. Tree stands do well throughout the country, except in some areas north of the Arctic Circle. In 1980 the forested area totaled about 19.8 million hectares, providing 4 hectares of forest per capita—far above the European average of about 0.5 hectares. The proportion of forest land varied considerably from region to region. In the central lake plateau and in the eastern and northern provinces, forests covered up to 80 percent of the land area, but in areas with better conditions for agriculture, especially in the southwest, forests accounted for only 50 to 60 percent of the territory. The main commercial tree species—pine, spruce, and birch—supplied raw material to the sawmill, pulp, and paper industries. The forests also produced sizable aspen and elder crops.