Frequencies for first 10,000 rows of ca_cleft variable in natlterr2015 dataset :

  Cleft Lip |
  w/ or w/o |
      Cleft |
   Palate Y |
        Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,078       10.78       10.78
          N |      8,806       88.06       98.84
          U |        114        1.14       99.98
          Y |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016