Frequencies for first 10,000 rows of mental variable in namcs1995 dataset :

     mental |
     status |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,732       97.32       97.32
          1 |        268        2.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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