Until 402.0 generations ago, the population of deme V was 8320. At that point, it changed to 3044, where it has stayed up to now.
time_units: generations
demes:
  - name: V
    start_time: .inf
    epochs:
      - start_size: 8320
        end_time: 402.0
      - start_size: 3044
        end_time: 0