The population of deme N held at 5047 until 7417.9178 generations back, when it changed reaching 8445, which has been constant since then.
time_units: generations
demes:
  - name: N
    start_time: .inf
    epochs:
      - start_size: 5047
        end_time: 7417.9178
      - start_size: 8445
        end_time: 0