Frequencies for first 10,000 rows of rf_cesar variable in natlterr2014 dataset 

   Previous |
 Cesarean Y |
        Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,077       10.77       10.77
          N |      7,506       75.06       85.83
          U |         76        0.76       86.59
          Y |      1,341       13.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Jun 2016