Frequencies for first 10,000 rows of uab_mecon variable in natlterr2006 dataset :

   Meconium |
 Aspiration |
   Syndrome |
        RFP |
744=f_uab_m |
  econsyn U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          2        0.02        0.02
          2 |      4,780       47.80       47.82
          9 |      1,493       14.93       62.75
          . |      3,725       37.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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