Frequencies for first 10,000 rows of meconsyn variable in linkco1991us_num dataset :

   Meconium |
 aspiration |
   syndrome |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         55        0.55        0.55
          2 |      8,795       87.95       88.50
          8 |          9        0.09       88.59
          9 |      1,141       11.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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