Frequencies for first 10,000 rows of rf_gdiab variable in natl2017 dataset :

Gestational |
 Diabetes Y |
        Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      8,921       89.21       89.21
          U |         90        0.90       90.11
          Y |        989        9.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Sep 2018