Frequencies for first 10,000 rows of mage8 variable in natlterr1996 dataset :

     Age of |
     Mother |
   recode 8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         60        0.60        0.60
          2 |      2,033       20.33       20.93
          3 |      3,143       31.43       52.36
          4 |      2,552       25.52       77.88
          5 |      1,463       14.63       92.51
          6 |        637        6.37       98.88
          7 |        106        1.06       99.94
          8 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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