Frequencies for first 10,000 rows of otherbld variable in namcs2008 dataset :

other blood |
       test |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,519       85.19       85.19
        yes |      1,481       14.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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