Initially, the population size of deme B stood at 4916, but this changed 2074.0 generations ago when it grew to 5163, and it has been stable at that size up to today.
time_units: generations
demes:
  - name: B
    start_time: .inf
    epochs:
      - start_size: 4916
        end_time: 2074.0
      - start_size: 5163
        end_time: 0