Up until 8498.5 generations ago, the population of D deme was constant at 4733. It then entered a linear phase of change until 7735.3588 generations, reaching size 2601. This was succeeded by an exponential phase of reduction, leading to 1666 by 639.9. From 639.9 generations to present, the population has increased from 1666 to 9327 exponentially.
time_units: generations
demes:
  - name: D
    start_time: .inf
    epochs:
      - start_size: 4733
        end_time: 8498.5
      - start_size: 4733
        end_size: 2601
        end_time: 7735.3588
        size_function: linear
      - start_size: 2601
        end_time: 639.9
        end_size: 1666
        size_function: exponential
      - end_time: 0
        start_size: 1666
        end_size: 9327
        size_function: exponential