Frequencies for first 10,000 rows of uab_mecon variable in natl2006 dataset :

   Meconium |
 Aspiration |
   Syndrome |
        RFP |
744=f_uab_m |
  econsyn U |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          7        0.07        0.07
          2 |      9,853       98.53       98.60
          9 |        140        1.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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