population: 3
 minimum value: 2
 maximum value: 12
 total value: 22
 average value: 7.33
 distribution:
  <=2: sub-population=1 (33.33%); cumulated value=2 (9.09%)
  <=8: sub-population=1 (33.33%); cumulated value=8 (36.36%)
  <=16: sub-population=1 (33.33%); cumulated value=12 (54.54%)
 list:
  nit: 12 (54.54%)
  : 8 (36.36%)
  ini: 2 (9.09%)