Frequencies for first 10,000 rows of urine variable in nhamcsopd1994 dataset :

 urinalysis |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,177       81.77       81.77
          1 |      1,823       18.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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