For the E deme, the population size remained at 1909 until 4260.9 generations ago, at which point a exponential increase took place until 1948.5 generations for size 8744. Afterward, the population saw an exponential reduction to 5686 by 502.0. From 502.0 generations ago to today, there's been a linear change from 5686 to 7199.
time_units: generations
demes:
  - name: E
    start_time: .inf
    epochs:
      - start_size: 1909
        end_time: 4260.9
      - start_size: 1909
        end_size: 8744
        end_time: 1948.5
        size_function: exponential
      - start_size: 8744
        end_time: 502.0
        end_size: 5686
        size_function: exponential
      - end_time: 0
        start_size: 5686
        end_size: 7199
        size_function: linear