Until a shift occurred 5955.7 generations ago, deme Q's population was consistently 9247. Since then, it reduced to 8912, a number that has remained unchanged to the current time.
time_units: generations
demes:
  - name: Q
    start_time: .inf
    epochs:
      - start_size: 9247
        end_time: 5955.7
      - start_size: 8912
        end_time: 0