H deme's population was steady at 7203 before it changed to 3023 838.75 generations ago, maintaining that number to the present.
time_units: generations
demes:
  - name: H
    start_time: .inf
    epochs:
      - start_size: 7203
        end_time: 838.75
      - start_size: 3023
        end_time: 0