For deme A, the population count was 7057 until a change 2842.6368 generations ago, where it increased to 8806, remaining steady thereafter.
time_units: generations
demes:
  - name: A
    start_time: .inf
    epochs:
      - start_size: 7057
        end_time: 2842.6368
      - start_size: 8806
        end_time: 0