Frequencies for first 10,000 rows of rf_ghype variable in natl2014 dataset :

Gestational |
Hypertensio |
    n Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,165       91.65       91.65
          U |        128        1.28       92.93
          Y |        707        7.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016