Originally, deme G had a population size of 7158, which decreased to 6366 around 6559.0 generations ago and has not changed since.
time_units: generations
demes:
  - name: G
    start_time: .inf
    epochs:
      - start_size: 7158
        end_time: 6559.0
      - start_size: 6366
        end_time: 0