Deme Q maintained a population of 6125 until there was a shift 1976.0 generations ago that grew its numbers to 7358, a figure that has remained the same since.
time_units: generations
demes:
  - name: Q
    start_time: .inf
    epochs:
      - start_size: 6125
        end_time: 1976.0
      - start_size: 7358
        end_time: 0