P deme's population was steady at 2191 before it increased to 2344 3425.9 generations ago, maintaining that number to the present.
time_units: generations
demes:
  - name: P
    start_time: .inf
    epochs:
      - start_size: 2191
        end_time: 3425.9
      - start_size: 2344
        end_time: 0