Frequencies for first 10,000 rows of urine variable in nhamcsopd2000 dataset :

 urinalysis |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,044       90.44       90.44
          1 |        956        9.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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