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

  Unplanned |
Hysterectom |
    y Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,956       99.56       99.56
          U |         39        0.39       99.95
          Y |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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