Until 657.0 generations ago, the population of deme H was 8714. At that point, it decreased to 1241, where it has stayed up to now.
time_units: generations
demes:
  - name: H
    start_time: .inf
    epochs:
      - start_size: 8714
        end_time: 657.0
      - start_size: 1241
        end_time: 0