Frequencies for first 10,000 rows of urine variable in namcs1998 dataset :

 urinalysis |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,087       90.87       90.87
          1 |        913        9.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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