Frequencies for first 10,000 rows of uld_meco variable in natlterr2009 dataset :

   Meconium |
        RFP |
712=f_uld_m |
econium U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        115        1.15        1.15
          2 |      8,515       85.15       86.30
          9 |      1,370       13.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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