Frequencies for first 10,000 rows of mage8 variable in natlterr1995 dataset :

     Age of |
     Mother |
   recode 8 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         71        0.71        0.71
          2 |      2,023       20.23       20.94
          3 |      3,124       31.24       52.18
          4 |      2,552       25.52       77.70
          5 |      1,537       15.37       93.07
          6 |        594        5.94       99.01
          7 |         90        0.90       99.91
          8 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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