Frequencies for first 10,000 rows of rf_gest variable in natlterr2008 dataset :

Gestational |
   Diabetes |
        RFP |
583=f_rf_gd |
      iab R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,061       60.61       60.61
          N |      3,868       38.68       99.29
          Y |         71        0.71      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 May 2016