Until a shift occurred 1333.5607 generations ago, deme V's population was consistently 7718. Since then, it decreased to 1504, a number that has remained unchanged to the current time.
time_units: generations
demes:
  - name: V
    start_time: .inf
    epochs:
      - start_size: 7718
        end_time: 1333.5607
      - start_size: 1504
        end_time: 0