Frequencies for first 10,000 rows of mm_uhyst variable in natlterr2015 dataset :

  Unplanned |
Hysterectom |
    y Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,078       10.78       10.78
          N |      8,760       87.60       98.38
          U |        162        1.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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