Frequencies for first 10,000 rows of mage8 variable in natlterr2001 dataset :

     Age of |
     Mother |
   Recode 8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         46        0.46        0.46
          2 |      1,971       19.71       20.17
          3 |      3,269       32.69       52.86
          4 |      2,461       24.61       77.47
          5 |      1,479       14.79       92.26
          6 |        631        6.31       98.57
          7 |        141        1.41       99.98
          8 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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