Frequencies for first 10,000 rows of cbc variable in namcs2012 dataset :

        CBC |
  (complete |
      blood |
     count) |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,003       90.03       90.03
        Yes |        997        9.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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