For deme T, the population count was 2039 until a change 6946.26 generations ago, where it changed to 9634, remaining steady thereafter.
time_units: generations
demes:
  - name: T
    start_time: .inf
    epochs:
      - start_size: 2039
        end_time: 6946.26
      - start_size: 9634
        end_time: 0