Frequencies for first 10,000 rows of urine variable in nhamcsopd2009 dataset :

 urinalysis |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,059       90.59       90.59
        yes |        941        9.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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