Frequencies for first 10,000 rows of mage8 variable in natl1988 dataset :

     Age of |
     Mother |
   recode 8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         53        0.53        0.53
          2 |      1,817       18.17       18.70
          3 |      3,233       32.33       51.03
          4 |      2,841       28.41       79.44
          5 |      1,554       15.54       94.98
          6 |        446        4.46       99.44
          7 |         55        0.55       99.99
          8 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016