Frequencies for first 10,000 rows of ivfluids variable in nhamcsed2011 dataset :

  IV fluids |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      7,426       74.26       74.26
        Yes |      2,574       25.74      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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