Frequencies for first 10,000 rows of mager9 variable in natl2013 dataset :

   Mother's |
 Age Recode |
      9 U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          6        0.06        0.06
          2 |        636        6.36        6.42
          3 |      2,621       26.21       32.63
          4 |      3,110       31.10       63.73
          5 |      2,359       23.59       87.32
          6 |      1,014       10.14       97.46
          7 |        233        2.33       99.79
          8 |         18        0.18       99.97
          9 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015