Frequencies for first 10,000 rows of ld_mecs variable in natl2013 dataset :

   Meconium |
   Staining |
        RFP |
614=f_ld_me |
      con R |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      8,707       87.07       87.07
          U |        153        1.53       88.60
          Y |      1,140       11.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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