Initially, the Y deme maintained a population of 8060 until 7685.5 generations ago. From 7685.5 to 5781.0, its size changed exponentially to population size 810. A exponential growth ensued, culminating in 3892 individuals by 3268.747. Starting from 3268.747 generations ago, the population has grew from 3892 to 6149, at a linear rate.
time_units: generations
demes:
  - name: Y
    start_time: .inf
    epochs:
      - start_size: 8060
        end_time: 7685.5
      - start_size: 8060
        end_size: 810
        end_time: 5781.0
        size_function: exponential
      - start_size: 810
        end_time: 3268.747
        end_size: 3892
        size_function: exponential
      - end_time: 0
        start_size: 3892
        end_size: 6149
        size_function: linear