Frequencies for first 10,000 rows of rf_cesarn variable in natlterr2006 dataset :

  Number of |
   Previous |
   Cesarean |
 Deliveries |
        RFP |
594=f_rf_nc |
     esar R |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,134       31.34       31.34
          1 |        456        4.56       35.90
          2 |        114        1.14       37.04
          3 |          6        0.06       37.10
          4 |          2        0.02       37.12
         11 |          1        0.01       37.13
         12 |          1        0.01       37.14
         99 |         11        0.11       37.25
          . |      6,275       62.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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