 Later, however, the decline in agriculture in rural communities in Ghana and rising industrialisation in urban regions, coupled with the late-1980s boom in the service sector, once again propelled immigration to Accra.The primacy of the Accra Metropolitan Area as the Greater Accra region's administrative, educational, industrial and commercial centre continues to be the major force for its population growth, with immigration contributing to over 35% of the Accra's population growth.The gross density of population for the Accra Metropolitan Area in 2000 was 10.03 persons per hectare, compared to 6.23 per hectare in 1970.