Frequencies for first 10,000 rows of gest_imp variable in natlterr2007 dataset :

  Gestation |
    Imputed |
   Flag U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        130        1.30        1.30
          . |      9,870       98.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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