Deme E had an initial size of 5054 until 6138.97 generations ago. At that time, its population size changed to 1629, and has remained there till current time.
time_units: generations
demes:
  - name: E
    start_time: .inf
    epochs:
      - start_size: 5054
        end_time: 6138.97
      - start_size: 1629
        end_time: 0