The number of individuals in deme W remained at 785 until 2350.7 generations ago, at which time it increased to a new stable size of 6765.
time_units: generations
demes:
  - name: W
    start_time: .inf
    epochs:
      - start_size: 785
        end_time: 2350.7
      - start_size: 6765
        end_time: 0