Frequencies for first 10,000 rows of lft variable in nhamcsed2014 dataset :

      Liver |
   function |
      tests |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,316       93.16       93.16
        Yes |        684        6.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017