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

      Blood |
    culture |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,569       95.69       95.69
        Yes |        431        4.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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