For deme V, the population count was 8581 until a change 6844.9 generations ago, where it changed to 6270, remaining steady thereafter.
time_units: generations
demes:
  - name: V
    start_time: .inf
    epochs:
      - start_size: 8581
        end_time: 6844.9
      - start_size: 6270
        end_time: 0