Frequencies for first 10,000 rows of otherbld variable in namcs2007 dataset :

other blood |
       test |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,707       87.07       87.07
        yes |      1,293       12.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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