Frequencies for first 10,000 rows of uld_meco variable in natlterr2013 dataset :

   Meconium |
        RFP |
712=f_uld_m |
econium U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        135        1.35        1.35
          2 |      8,408       84.08       85.43
          9 |      1,457       14.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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