The population of deme A held at 5577 until 6863.8479 generations back, when it decreased reaching 2672, which has been constant since then.
time_units: generations
demes:
  - name: A
    start_time: .inf
    epochs:
      - start_size: 5577
        end_time: 6863.8479
      - start_size: 2672
        end_time: 0