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

  IV fluids |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      7,442       74.42       74.42
        Yes |      2,558       25.58      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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