Frequencies for first 10,000 rows of rf_cesarn variable in natl2015 dataset :

  Number of |
   Previous |
  Cesareans |
    00 None |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,755       87.55       87.55
          1 |        828        8.28       95.83
          2 |        208        2.08       97.91
          3 |         54        0.54       98.45
          4 |         16        0.16       98.61
          5 |          5        0.05       98.66
          6 |          2        0.02       98.68
         99 |        132        1.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016