Up until 2206.5418 generations ago, the count of N deme was 3425. Following that period, it changed to 5027, where it has persisted until now.
time_units: generations
demes:
  - name: N
    start_time: .inf
    epochs:
      - start_size: 3425
        end_time: 2206.5418
      - start_size: 5027
        end_time: 0