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

  Number of |
   Previous |
   Cesarean |
 Deliveries |
 RFP 594= R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,799       87.99       87.99
          1 |        723        7.23       95.22
          2 |        197        1.97       97.19
          3 |         56        0.56       97.75
          4 |          9        0.09       97.84
          5 |          4        0.04       97.88
          6 |          5        0.05       97.93
          7 |          2        0.02       97.95
         99 |        205        2.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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