Frequencies for first 10,000 rows of rf_gdiab variable in natlterr2015 dataset :

Gestational |
 Diabetes Y |
        Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,078       10.78       10.78
          N |      8,580       85.80       96.58
          U |         57        0.57       97.15
          Y |        285        2.85      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016