Frequencies for first 10,000 rows of blodpres variable in namcs2013 dataset :

  Was blood |
   pressure |
     taken? |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      3,382       33.82       33.82
        Yes |      6,618       66.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017