Frequencies for first 10,000 rows of otherbld variable in nhamcsed2014 dataset :

Other blood |
       test |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      7,522       75.22       75.22
        Yes |      2,478       24.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017