Frequencies for first 10,000 rows of bladcath variable in nhamcsed2012 dataset :

    Bladder |
   catheter |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,863       98.63       98.63
        Yes |        137        1.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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