Up until 9389.6021 generations ago, the population of U deme was constant at 6785. It then entered a exponential phase of change until 7280.3 generations, reaching size 6374. This was succeeded by an exponential phase of change, leading to 3397 by 284.0. From 284.0 generations to present, the population has increased from 3397 to 4532 exponentially.
time_units: generations
demes:
  - name: U
    start_time: .inf
    epochs:
      - start_size: 6785
        end_time: 9389.6021
      - start_size: 6785
        end_size: 6374
        end_time: 7280.3
        size_function: exponential
      - start_size: 6374
        end_time: 284.0
        end_size: 3397
        size_function: exponential
      - end_time: 0
        start_size: 3397
        end_size: 4532
        size_function: exponential