For deme G, the population count was 6520 until a change 3202.0289 generations ago, where it changed to 1833, remaining steady thereafter.
time_units: generations
demes:
  - name: G
    start_time: .inf
    epochs:
      - start_size: 6520
        end_time: 3202.0289
      - start_size: 1833
        end_time: 0