Frequencies for first 10,000 rows of meconsyn variable in natl1998 dataset :

   Meconium |
 aspiration |
   syndrome |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         13        0.13        0.13
          2 |      9,984       99.84       99.97
          9 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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