The population size of Y deme stood at 3969 until a shift at 8847.977 generations ago, leading to a linear change up to 6891.0 generations and 5866 individuals. Following this, there was an linear change to 6948 individuals by 5019.6. Since 5019.6, the population has seen a exponential changed from 6948 to 190, continuing to the current time.
time_units: generations
demes:
  - name: Y
    start_time: .inf
    epochs:
      - start_size: 3969
        end_time: 8847.977
      - start_size: 3969
        end_size: 5866
        end_time: 6891.0
        size_function: linear
      - start_size: 5866
        end_time: 5019.6
        end_size: 6948
        size_function: linear
      - end_time: 0
        start_size: 6948
        end_size: 190
        size_function: exponential