Frequencies for first 10,000 rows of otherbld variable in namcs2006 dataset :

other blood |
       test |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,877       88.77       88.77
        yes |      1,123       11.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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