Frequencies for first 10,000 rows of urine variable in nhamcsed1998 dataset :

 urinalysis |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,225       82.25       82.25
          1 |      1,775       17.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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