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

     stress |
 management |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,732       97.32       97.32
        yes |        268        2.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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