Frequencies for first 10,000 rows of rf_ghype variable in natl2016 dataset :

Gestational |
Hypertensio |
    n Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,035       90.35       90.35
          U |         60        0.60       90.95
          Y |        905        9.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 4 Oct 2017