Frequencies for first 10,000 rows of ca_cdh variable in natl2005 dataset :

 Congenital |
Diaphragmat |
ic Hernia R |      Freq.     Percent        Cum.
------------+-----------------------------------
            |     10,000      100.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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