Frequencies for first 10,000 rows of dmagerpt variable in natl1989 dataset :

   Reported |
     Age of |
     Mother |      Freq.     Percent        Cum.
------------+-----------------------------------
         18 |          1        0.01        0.01
         21 |          1        0.01        0.02
         27 |          1        0.01        0.03
         28 |          1        0.01        0.04
         99 |      9,996       99.96      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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