Frequencies for first 10,000 rows of rf_cesar variable in natl2014 dataset :

   Previous |
 Cesarean Y |
        Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      8,762       87.62       87.62
          U |        128        1.28       88.90
          Y |      1,110       11.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016