Frequencies for first 10,000 rows of gestrec3 variable in natlterr2011 dataset :

  Gestation |
   Recode 3 |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,320       13.20       13.20
          2 |      7,387       73.87       87.07
          3 |      1,293       12.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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