Frequencies for first 10,000 rows of rf_cesar variable in natl2013 dataset :

   Previous |
   Cesarean |
 Deliveries |
        RFP |
593=f_rf_nc |
     esar R |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      8,799       87.99       87.99
          U |        167        1.67       89.66
          Y |      1,034       10.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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