Deme P had an initial size of 8234 until 9316.0 generations ago. At that time, its population size changed to 3878, and has remained there till current time.
time_units: generations
demes:
  - name: P
    start_time: .inf
    epochs:
      - start_size: 8234
        end_time: 9316.0
      - start_size: 3878
        end_time: 0