The deme of J kept its population at 3827 until 8091.0 generations ago, when a exponential growth ensued until 5755.75, to size 8347. Subsequently, a linear change changed the numbers to 1145 individuals by 5410.23. Starting from 5410.23, the population has seen a increase from 1145 to 1758 at a linear pace, continuing to this day.
time_units: generations
demes:
  - name: J
    start_time: .inf
    epochs:
      - start_size: 3827
        end_time: 8091.0
      - start_size: 3827
        end_size: 8347
        end_time: 5755.75
        size_function: exponential
      - start_size: 8347
        end_time: 5410.23
        end_size: 1145
        size_function: linear
      - end_time: 0
        start_size: 1145
        end_size: 1758
        size_function: linear