Frequencies for first 10,000 rows of ca_clpal variable in natl2017 dataset :

      Cleft |
     Palate |
alone Y Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,994       99.94       99.94
          Y |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Sep 2018