Frequencies for first 10,000 rows of mage8 variable in natl1999 dataset :

     Age of |
     Mother |
   recode 8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         37        0.37        0.37
          2 |      1,658       16.58       16.95
          3 |      3,069       30.69       47.64
          4 |      2,724       27.24       74.88
          5 |      1,734       17.34       92.22
          6 |        659        6.59       98.81
          7 |        114        1.14       99.95
          8 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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