Frequencies for first 10,000 rows of rf_ghype variable in natl2015 dataset :

Gestational |
Hypertensio |
    n Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,078       90.78       90.78
          U |        108        1.08       91.86
          Y |        814        8.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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