Initially, the population size of deme N stood at 893, but this changed 5020.502 generations ago when it increased to 2249, and it has been stable at that size up to today.
time_units: generations
demes:
  - name: N
    start_time: .inf
    epochs:
      - start_size: 893
        end_time: 5020.502
      - start_size: 2249
        end_time: 0