Frequencies for first 10,000 rows of uld_meco variable in natlterr2012 dataset :

   Meconium |
        RFP |
712=f_uld_m |
econium U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        147        1.47        1.47
          2 |      8,341       83.41       84.88
          9 |      1,512       15.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 5 May 2016