Frequencies for first 10,000 rows of mm_uhyst variable in natlterr2012 dataset :

  Unplanned |
Hysterectom |
          y |
625=f_mm_uh |
     ystr R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,163       11.63       11.63
          N |      8,461       84.61       96.24
          U |        374        3.74       99.98
          Y |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 5 May 2016