Up until 4901.2 generations ago, the population of D deme was constant at 5517. It then entered a exponential phase of change until 1940.78 generations, reaching size 2010. This was succeeded by an exponential phase of increase, leading to 2245 by 208.5966. From 208.5966 generations to present, the population has reduced from 2245 to 1361 linearly.
time_units: generations
demes:
  - name: D
    start_time: .inf
    epochs:
      - start_size: 5517
        end_time: 4901.2
      - start_size: 5517
        end_size: 2010
        end_time: 1940.78
        size_function: exponential
      - start_size: 2010
        end_time: 208.5966
        end_size: 2245
        size_function: exponential
      - end_time: 0
        start_size: 2245
        end_size: 1361
        size_function: linear