Frequencies for first 10,000 rows of rf_ncesar variable in linkpe2009psden dataset :

  Number of |
   Previous |
   Cesarean |
 Deliveries |
          R |
(f_rf_ncesa |
r rep flag) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      5,257       52.57       52.57
          1 |      1,063       10.63       63.20
          2 |        233        2.33       65.53
          3 |         23        0.23       65.76
          4 |          1        0.01       65.77
         99 |          1        0.01       65.78
          . |      3,422       34.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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