Frequencies for first 10,000 rows of urine variable in nhamcsopd2010 dataset :

 urinalysis |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,089       90.89       90.89
        yes |        911        9.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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