Initially, the population size of deme M stood at 9038, but this changed 2260.794 generations ago when it changed to 2473, and it has been stable at that size up to today.
time_units: generations
demes:
  - name: M
    start_time: .inf
    epochs:
      - start_size: 9038
        end_time: 2260.794
      - start_size: 2473
        end_time: 0