Frequencies for first 10,000 rows of bloodcx variable in nhamcsed2002 dataset :

      blood |
    culture |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,678       96.78       96.78
          1 |        322        3.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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