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

   Ruptured |
   Uterus Y |
        Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,078       10.78       10.78
          N |      8,759       87.59       98.37
          U |        162        1.62       99.99
          Y |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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