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

  Cleft Lip |
  w/ or w/o |
      Cleft |
 Palate RFP |
642=f_ca_cl |
     eflp R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,656       46.56       46.56
          N |      4,369       43.69       90.25
          U |        973        9.73       99.98
          Y |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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