For the F deme, the population size remained at 4952 until 6962.1531 generations ago, at which point a linear change took place until 4297.0 generations for size 8276. Afterward, the population saw an linear decrease to 2007 by 2736.708. From 2736.708 generations ago to today, there's been a linear decrease from 2007 to 677.
time_units: generations
demes:
  - name: F
    start_time: .inf
    epochs:
      - start_size: 4952
        end_time: 6962.1531
      - start_size: 4952
        end_size: 8276
        end_time: 4297.0
        size_function: linear
      - start_size: 8276
        end_time: 2736.708
        end_size: 2007
        size_function: linear
      - end_time: 0
        start_size: 2007
        end_size: 677
        size_function: linear