Frequencies for first 10,000 rows of flgbwimp variable in natl1997 dataset :

    Imputed |
Birthweight |
       Flag |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,998       99.98       99.98
          1 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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