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

 Congenital |
Diaphragmat |
  ic Hernia |
        RFP |
638=f_ca_he |
     rnia R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,656       46.56       46.56
          N |      4,371       43.71       90.27
          U |        973        9.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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