couple children yearsmarried  Male  Female
  1      no        15          5      6
  2      no        15          7      6
  3      no        15          7      6
  4      no        15          4      5
  5      no        30          6      5
  6      no        30          6      5
  7      no        30          6      4
  8      no        30          8      6
  9      yes       15          5      5
 10      yes       15          4      5
 11      yes       15          5      4
 12      yes       15          6      5
 13      yes       30          7      6
 14      yes       30          8      7
 15      yes       30          7      7
 16      yes       30          8      7