Until 8369.4 generations ago, the population of deme K was 7914. At that point, it reduced to 3583, where it has stayed up to now.
time_units: generations
demes:
  - name: K
    start_time: .inf
    epochs:
      - start_size: 7914
        end_time: 8369.4
      - start_size: 3583
        end_time: 0