Frequencies for first 10,000 rows of rf_gest variable in natlterr2006 dataset :

Gestational |
   Diabetes |
        RFP |
583=f_rf_gd |
      iab R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,275       62.75       62.75
          N |      3,642       36.42       99.17
          Y |         83        0.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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