Frequencies for first 10,000 rows of blodpres variable in namcs2002 dataset :

      Blood |
   pressure |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      5,884       58.84       58.84
        Yes |      4,116       41.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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