Up until 2005.41 generations ago, the count of O deme was 2915. Following that period, it grew to 8002, where it has persisted until now.
time_units: generations
demes:
  - name: O
    start_time: .inf
    epochs:
      - start_size: 2915
        end_time: 2005.41
      - start_size: 8002
        end_time: 0