Frequencies for first 10,000 rows of menstat variable in nhamcsed2001 dataset :

     mental |
     status |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,733       87.33       87.33
          1 |      1,267       12.67      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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