Frequencies for first 10,000 rows of htn variable in nhamcsopd2005 dataset :

       does |
patient now |
     have - |
hypertensio |
          n |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,112       81.12       81.12
        yes |      1,888       18.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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