Frequencies for first 10,000 rows of ld_fint variable in natlterr2006 dataset :

      Fetal |
Intolerance |
        RFP |
615=f_ld_fi |
     ntol R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,275       62.75       62.75
          N |      3,619       36.19       98.94
          Y |        106        1.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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