Frequencies for first 10,000 rows of uld_meco variable in natl2007 dataset :

   Meconium |
        RFP |
712=f_uld_m |
econium U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        471        4.71        4.71
          2 |      8,883       88.83       93.54
          9 |        646        6.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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