Frequencies for first 10,000 rows of ld_mecs variable in natlterr2007 dataset :

   Meconium |
   Staining |
        RFP |
614=f_ld_me |
      con R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,163       61.63       61.63
          N |      3,799       37.99       99.62
          U |          1        0.01       99.63
          Y |         37        0.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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