Frequencies for first 10,000 rows of gestrec3 variable in natl2003 dataset :

  Gestation |
   Recode 3 |
        U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,075       10.75       10.75
          2 |      8,841       88.41       99.16
          3 |         84        0.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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