Frequencies for first 10,000 rows of mage8 variable in natl1991 dataset :

     Age of |
     Mother |
   recode 8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         38        0.38        0.38
          2 |      1,822       18.22       18.60
          3 |      3,074       30.74       49.34
          4 |      2,789       27.89       77.23
          5 |      1,676       16.76       93.99
          6 |        525        5.25       99.24
          7 |         74        0.74       99.98
          8 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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