Frequencies for first 10,000 rows of meconsyn variable in natl1993 dataset :

   Meconium |
 aspiration |
   syndrome |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         27        0.27        0.27
          2 |      9,911       99.11       99.38
          9 |         62        0.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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