The population of deme T held at 5377 until 6867.388 generations back, when it decreased reaching 3345, which has been constant since then.
time_units: generations
demes:
  - name: T
    start_time: .inf
    epochs:
      - start_size: 5377
        end_time: 6867.388
      - start_size: 3345
        end_time: 0