As was the case in the 1960 and 1970 figures, the greatest concentration of population in 1984 was to the south of the Kwahu Plateau. The highest concentration of habitation continued to be within the Accra-Kumasi-Takoradi triangle, largely because of the economic productivity of the region. All of Ghana's mining centers, timber-producing deciduous forests, and cocoa-growing lands lie to the south of the Kwahu Plateau. The Accra-Kumasi-Takoradi triangle is linked to the coast by rail and road systems—making this area an important magnet for investment and labor.