Frequencies for first 10,000 rows of rf_cesar variable in natlterr2009 dataset :

   Previous |
   Cesarean |
 Deliveries |
        RFP |
593=f_rf_ce |
      sar R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,449       24.49       24.49
          N |      6,054       60.54       85.03
          U |          2        0.02       85.05
          Y |      1,495       14.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015