The number of individuals in deme Q remained at 3453 until 5666.0 generations ago, at which time it grew to a new stable size of 7542.
time_units: generations
demes:
  - name: Q
    start_time: .inf
    epochs:
      - start_size: 3453
        end_time: 5666.0
      - start_size: 7542
        end_time: 0