Frequencies for first 10,000 rows of uld_meco variable in natlterr2010 dataset :

   Meconium |
        RFP |
712=f_uld_m |
econium U;R |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        191        1.91        1.91
          2 |      7,694       76.94       78.85
          9 |      2,115       21.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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