Initially, the population size of deme X stood at 310, but this changed 1626.67 generations ago when it grew to 7626, and it has been stable at that size up to today.
time_units: generations
demes:
  - name: X
    start_time: .inf
    epochs:
      - start_size: 310
        end_time: 1626.67
      - start_size: 7626
        end_time: 0