Frequencies for first 10,000 rows of htn variable in nhamcsopd2007 dataset :

       does |
patient now |
      have: |
hypertensio |
          n |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      7,816       78.16       78.16
        yes |      2,184       21.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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