Frequencies for first 10,000 rows of gestrec3 variable in natlterr2005 dataset :

  Gestation |
   Recode 3 |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,365       13.65       13.65
          2 |      6,909       69.09       82.74
          3 |      1,726       17.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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