Frequencies for first 10,000 rows of mage8 variable in natlterr1998 dataset :

     Age of |
     Mother |
   recode 8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         58        0.58        0.58
          2 |      1,995       19.95       20.53
          3 |      3,178       31.78       52.31
          4 |      2,483       24.83       77.14
          5 |      1,576       15.76       92.90
          6 |        589        5.89       98.79
          7 |        115        1.15       99.94
          8 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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