Frequencies for first 10,000 rows of rf_cesar variable in natl2017 dataset :

   Previous |
 Cesarean Y |
        Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      8,794       87.94       87.94
          U |         90        0.90       88.84
          Y |      1,116       11.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Sep 2018