The U deme's size was 3517 until 8456.52 generations ago, when it began a exponential change, reaching 7469 individuals by 7624.8974. After this period, the population underwent an exponential change, reaching 8053 individuals by 4638.209. From 4638.209 generations ago to now, the population decreased from 8053 to 2856 at a linear rate.
time_units: generations
demes:
  - name: U
    start_time: .inf
    epochs:
      - start_size: 3517
        end_time: 8456.52
      - start_size: 3517
        end_size: 7469
        end_time: 7624.8974
        size_function: exponential
      - start_size: 7469
        end_time: 4638.209
        end_size: 8053
        size_function: exponential
      - end_time: 0
        start_size: 8053
        end_size: 2856
        size_function: linear