Frequencies for first 10,000 rows of bladcath variable in nhamcsed2013 dataset :

    Bladder |
   catheter |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,865       98.65       98.65
        Yes |        135        1.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016