Frequencies for first 10,000 rows of ca_cdh variable in natlterr2012 dataset :

 Congenital |
Diaphragmat |
  ic Hernia |
        RFP |
638=f_ca_he |
     rnia R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      1,163       11.63       11.63
          N |      8,398       83.98       95.61
          U |        438        4.38       99.99
          Y |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 5 May 2016