The deme of D kept its population at 5890 until 8438.0 generations ago, when a linear decrease ensued until 6147.5243, to size 863. Subsequently, a linear change changed the numbers to 9055 individuals by 5941.0. Starting from 5941.0, the population has seen a change from 9055 to 1907 at a linear pace, continuing to this day.
time_units: generations
demes:
  - name: D
    start_time: .inf
    epochs:
      - start_size: 5890
        end_time: 8438.0
      - start_size: 5890
        end_size: 863
        end_time: 6147.5243
        size_function: linear
      - start_size: 863
        end_time: 5941.0
        end_size: 9055
        size_function: linear
      - end_time: 0
        start_size: 9055
        end_size: 1907
        size_function: linear