Frequencies for first 10,000 rows of mage8 variable in natl1993 dataset :

     Age of |
     Mother |
   recode 8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         77        0.77        0.77
          2 |      1,887       18.87       19.64
          3 |      3,120       31.20       50.84
          4 |      2,606       26.06       76.90
          5 |      1,653       16.53       93.43
          6 |        575        5.75       99.18
          7 |         80        0.80       99.98
          8 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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