Frequencies for first 10,000 rows of mage8 variable in natlterr1994 dataset :

     Age of |
     Mother |
   recode 8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         75        0.75        0.75
          2 |      2,007       20.07       20.82
          3 |      3,176       31.76       52.58
          4 |      2,597       25.97       78.55
          5 |      1,439       14.39       92.94
          6 |        600        6.00       98.94
          7 |        104        1.04       99.98
          8 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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