Frequencies for first 10,000 rows of mage8 variable in natl1996 dataset :

     Age of |
     Mother |
   recode 8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         54        0.54        0.54
          2 |      1,869       18.69       19.23
          3 |      3,027       30.27       49.50
          4 |      2,483       24.83       74.33
          5 |      1,759       17.59       91.92
          6 |        687        6.87       98.79
          7 |        117        1.17       99.96
          8 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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