Frequencies for first 10,000 rows of uab_mecon variable in natlterr2005 dataset :

   Meconium |
 Aspiration |
 Syndrome U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          1        0.01        0.01
          2 |      4,497       44.97       44.98
          9 |      1,757       17.57       62.55
          . |      3,745       37.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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