Initially, the Y deme's population count was 5903 until 4074.791 generations ago, at which point it began a exponential change until reaching size 1911 in 4019.7825 generations. Post this phase, the deme experienced an linear increase to 2017 individuals by 3285.3. From 3285.3 generations ago to today, the number of individuals has grew from 2017 to 7530 at a exponential growth rate.
time_units: generations
demes:
  - name: Y
    start_time: .inf
    epochs:
      - start_size: 5903
        end_time: 4074.791
      - start_size: 5903
        end_size: 1911
        end_time: 4019.7825
        size_function: exponential
      - start_size: 1911
        end_time: 3285.3
        end_size: 2017
        size_function: linear
      - end_time: 0
        start_size: 2017
        end_size: 7530
        size_function: exponential