The number of individuals in deme C remained at 6195 until 6598.0 generations ago, at which time it changed to a new stable size of 6258.
time_units: generations
demes:
  - name: C
    start_time: .inf
    epochs:
      - start_size: 6195
        end_time: 6598.0
      - start_size: 6258
        end_time: 0