Frequencies for first 10,000 rows of ca_clpal variable in natlterr2011 dataset :

      Cleft |
     Palate |
  alone RFP |
643=f_ca_cl |
      eft R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,536       25.36       25.36
          N |      6,368       63.68       89.04
          U |      1,096       10.96      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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