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

     Age of |
     Mother |
 Imputation |
       Flag |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,996       99.96       99.96
          1 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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