Frequencies for first 10,000 rows of bladcath variable in nhamcsed2010 dataset :

    Bladder |
   catheter |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,792       97.92       97.92
        yes |        208        2.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016