Deme G had an initial size of 9102 until 1507.2035 generations ago. At that time, its population size changed to 6649, and has remained there till current time.
time_units: generations
demes:
  - name: G
    start_time: .inf
    epochs:
      - start_size: 9102
        end_time: 1507.2035
      - start_size: 6649
        end_time: 0