Deme K maintained a population of 2947 until there was a shift 4464.6 generations ago that increased its numbers to 8114, a figure that has remained the same since.
time_units: generations
demes:
  - name: K
    start_time: .inf
    epochs:
      - start_size: 2947
        end_time: 4464.6
      - start_size: 8114
        end_time: 0