//---------------------------------------------------------------------
 public SpecificAgesCohortSelector(IList<ushort>                   ages,
     IList<AgeRange>                 ranges,
     IDictionary<ushort, Percentage> percentages)
 {
     agesAndRanges = new AgesAndRanges(ages, ranges);
     this.percentages = new Dictionary<ushort, Percentage>(percentages);
 }
 //---------------------------------------------------------------------
 public SpecificAgesCohortSelector(IList<ushort>   ages,
     IList<AgeRange> ranges)
 {
     agesAndRanges = new AgesAndRanges(ages, ranges);
 }
        //---------------------------------------------------------------------

        public SpecificAgesCohortSelector(IList <ushort> ages,
                                          IList <AgeRange> ranges)
        {
            agesAndRanges = new AgesAndRanges(ages, ranges);
        }