Frequencies for first 10,000 rows of mentstat variable in nhamcsed1999 dataset :

     mental |
status exam |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,506       85.06       85.06
          1 |      1,494       14.94      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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