Q deme's population was steady at 3632 before it changed to 2829 7376.0 generations ago, maintaining that number to the present.
time_units: generations
demes:
  - name: Q
    start_time: .inf
    epochs:
      - start_size: 3632
        end_time: 7376.0
      - start_size: 2829
        end_time: 0