Frequencies for first 10,000 rows of mage8 variable in natlterr2002 dataset :

     Age of |
     Mother |
   Recode 8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         62        0.62        0.62
          2 |      1,833       18.33       18.95
          3 |      3,267       32.67       51.62
          4 |      2,481       24.81       76.43
          5 |      1,502       15.02       91.45
          6 |        685        6.85       98.30
          7 |        166        1.66       99.96
          8 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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