Up until 7414.681 generations ago, the population of Y deme was constant at 7593. It then entered a exponential phase of change until 5193.9 generations, reaching size 2774. This was succeeded by an exponential phase of growth, leading to 3158 by 3072.6041. From 3072.6041 generations to present, the population has grew from 3158 to 9546 exponentially.
time_units: generations
demes:
  - name: Y
    start_time: .inf
    epochs:
      - start_size: 7593
        end_time: 7414.681
      - start_size: 7593
        end_size: 2774
        end_time: 5193.9
        size_function: exponential
      - start_size: 2774
        end_time: 3072.6041
        end_size: 3158
        size_function: exponential
      - end_time: 0
        start_size: 3158
        end_size: 9546
        size_function: exponential