Frequencies for first 10,000 rows of meconsyn variable in natl1989 dataset :

   Meconium |
 aspiration |
   syndrome |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         24        0.24        0.24
          2 |      9,786       97.86       98.10
          9 |        190        1.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016