X deme's population was steady at 8992 before it changed to 2770 1925.335 generations ago, maintaining that number to the present.
time_units: generations
demes:
  - name: X
    start_time: .inf
    epochs:
      - start_size: 8992
        end_time: 1925.335
      - start_size: 2770
        end_time: 0