Frequencies for first 10,000 rows of menstat variable in nhamcsed2004 dataset :

     mental |
     status |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,571       85.71       85.71
        yes |      1,429       14.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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