Frequencies for first 10,000 rows of uld_meco variable in natlterr2011 dataset :

   Meconium |
        RFP |
712=f_uld_m |
econium U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        144        1.44        1.44
          2 |      7,493       74.93       76.37
          9 |      2,363       23.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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