Frequencies for first 10,000 rows of rf_cesar variable in natlterr2013 dataset :

   Previous |
   Cesarean |
 Deliveries |
        RFP |
593=f_rf_nc |
     esar R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,077       10.77       10.77
          N |      7,420       74.20       84.97
          U |        242        2.42       87.39
          Y |      1,261       12.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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