Deme S had an initial size of 5153 until 7084.1303 generations ago. At that time, its population size reduced to 3114, and has remained there till current time.
time_units: generations
demes:
  - name: S
    start_time: .inf
    epochs:
      - start_size: 5153
        end_time: 7084.1303
      - start_size: 3114
        end_time: 0