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

   Previous |
   Cesarean |
 Deliveries |
        RFP |
593=f_rf_nc |
     esar R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,163       11.63       11.63
          N |      7,645       76.45       88.08
          U |        193        1.93       90.01
          Y |        999        9.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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