Frequencies for first 10,000 rows of gest_imp variable in natlterr2010 dataset :

  Gestation |
    Imputed |
   Flag U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        161        1.61        1.61
          . |      9,839       98.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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