Originally, deme P had a population size of 1452, which increased to 5024 around 6244.6554 generations ago and has not changed since.
time_units: generations
demes:
  - name: P
    start_time: .inf
    epochs:
      - start_size: 1452
        end_time: 6244.6554
      - start_size: 5024
        end_time: 0