For the C deme, the population size remained at 3096 until 6447.96 generations ago, at which point a exponential change took place until 6101.56 generations for size 3534. Afterward, the population saw an exponential reduction to 2972 by 4487.429. From 4487.429 generations ago to today, there's been a linear decrease from 2972 to 987.
time_units: generations
demes:
  - name: C
    start_time: .inf
    epochs:
      - start_size: 3096
        end_time: 6447.96
      - start_size: 3096
        end_size: 3534
        end_time: 6101.56
        size_function: exponential
      - start_size: 3534
        end_time: 4487.429
        end_size: 2972
        size_function: exponential
      - end_time: 0
        start_size: 2972
        end_size: 987
        size_function: linear