Frequencies for first 10,000 rows of ca_cdh variable in natl2017 dataset :

 Congenital |
Diaphragmat |
ic Hernia Y |
        Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,999       99.99       99.99
          Y |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Sep 2018