R deme's population was steady at 710 before it grew to 5154 6486.5416 generations ago, maintaining that number to the present.
time_units: generations
demes:
  - name: R
    start_time: .inf
    epochs:
      - start_size: 710
        end_time: 6486.5416
      - start_size: 5154
        end_time: 0