Until 9138.8834 generations ago, the J deme's population was fixed at 1835. From 9138.8834 to 7452.13, it underwent a linear change to 1746 individuals. Then, a exponential increase brought the count to 4429 by 4418.2. Since then, from 4418.2 generations to the current day, the population has changed from 4429 to 258 at a linear rate.
time_units: generations
demes:
  - name: J
    start_time: .inf
    epochs:
      - start_size: 1835
        end_time: 9138.8834
      - start_size: 1835
        end_size: 1746
        end_time: 7452.13
        size_function: linear
      - start_size: 1746
        end_time: 4418.2
        end_size: 4429
        size_function: exponential
      - end_time: 0
        start_size: 4429
        end_size: 258
        size_function: linear