Frequencies for first 10,000 rows of uld_meco variable in natl2010 dataset :

   Meconium |
        RFP |
712=f_uld_m |
econium U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        616        6.16        6.16
          2 |      8,267       82.67       88.83
          9 |      1,117       11.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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