Frequencies for first 10,000 rows of mage8 variable in natl1986 dataset :

     Age of |
     Mother |
   recode 8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         51        0.51        0.51
          2 |      1,835       18.35       18.86
          3 |      3,290       32.90       51.76
          4 |      2,820       28.20       79.96
          5 |      1,502       15.02       94.98
          6 |        443        4.43       99.41
          7 |         56        0.56       99.97
          8 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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