G deme's population was steady at 3570 before it increased to 9574 8973.82 generations ago, maintaining that number to the present.
time_units: generations
demes:
  - name: G
    start_time: .inf
    epochs:
      - start_size: 3570
        end_time: 8973.82
      - start_size: 9574
        end_time: 0