Frequencies for first 10,000 rows of otherbld variable in nhamcsopd2010 dataset :

other blood |
       test |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,515       85.15       85.15
        yes |      1,485       14.85      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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