Frequencies for first 10,000 rows of rf_cesarn variable in natlterr2007 dataset :

  Number of |
   Previous |
   Cesarean |
 Deliveries |
        RFP |
594=f_rf_nc |
     esar R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,146       31.46       31.46
          1 |        546        5.46       36.92
          2 |        124        1.24       38.16
          3 |         18        0.18       38.34
          4 |          1        0.01       38.35
          5 |          1        0.01       38.36
         99 |          1        0.01       38.37
          . |      6,163       61.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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