Frequencies for first 10,000 rows of ca_limb variable in natl2015 dataset :

       Limb |
  Reduction |
   Defect Y |
        Yes |      Freq.     Percent        Cum.
------------+-----------------------------------
          N |      9,994       99.94       99.94
          U |          1        0.01       99.95
          Y |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Oct 2016