Frequencies for first 10,000 rows of uld_meco variable in natl2011 dataset :

   Meconium |
        RFP |
712=f_uld_m |
econium U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        701        7.01        7.01
          2 |      7,586       75.86       82.87
          9 |      1,713       17.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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