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

       PLAC |
  Reporting |
   Flag for |
   Perineal |
 Laceration |
          0 |
Non-Reporti |
         ng |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |          5        0.05        0.05
          1 |      9,995       99.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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