Frequencies for first 10,000 rows of stress variable in nhamcsopd1997 dataset :

     stress |
 management |
 couns/educ |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,648       96.48       96.48
          1 |        352        3.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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