Deme W had an initial size of 3883 until 1673.0 generations ago. At that time, its population size reduced to 2741, and has remained there till current time.
time_units: generations
demes:
  - name: W
    start_time: .inf
    epochs:
      - start_size: 3883
        end_time: 1673.0
      - start_size: 2741
        end_time: 0