Until 777.0 generations ago, the population of deme H was 7695. At that point, it changed to 5601, where it has stayed up to now.
time_units: generations
demes:
  - name: H
    start_time: .inf
    epochs:
      - start_size: 7695
        end_time: 777.0
      - start_size: 5601
        end_time: 0