Up until 6431.0 generations ago, the count of E deme was 5093. Following that period, it changed to 3155, where it has persisted until now.
time_units: generations
demes:
  - name: E
    start_time: .inf
    epochs:
      - start_size: 5093
        end_time: 6431.0
      - start_size: 3155
        end_time: 0