D3:Africa Urbanization/0 Rural Population

So I understand the idea behind Urbanization, people leave rural areas for the cities as your country becomes more developed, has higher paying jobs and Agricultural Efficiency reduces the need for farm labour. However every game I’ve played in 102 hours ends with 100% Urban membership, 0% Rural population. Not a single farmer to be found in the entire nation. This is with having enacted all of the policies to boost rural happiness, income, membership, etc. The rural people are very happy and well paid, but non-existent. Currently Im experimenting with lowering technology and agricultural efficiency, and trying to make urban life less appealing, but there is no change. Im thinking this is a bug, but please correct me if Im wrong.