The U deme's size was 5020 until 9562.0 generations ago, when it began a linear change, reaching 235 individuals by 8596.882. After this period, the population underwent an linear growth, reaching 5463 individuals by 1871.8. From 1871.8 generations ago to now, the population grew from 5463 to 6164 at a exponential rate.
time_units: generations
demes:
  - name: U
    start_time: .inf
    epochs:
      - start_size: 5020
        end_time: 9562.0
      - start_size: 5020
        end_size: 235
        end_time: 8596.882
        size_function: linear
      - start_size: 235
        end_time: 1871.8
        end_size: 5463
        size_function: linear
      - end_time: 0
        start_size: 5463
        end_size: 6164
        size_function: exponential