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

 Congenital |
Diaphragmat |
  ic Hernia |
        RFP |
638=f_ca_he |
     rnia R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,536       25.36       25.36
          N |      6,367       63.67       89.03
          U |      1,096       10.96       99.99
          Y |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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