Frequencies for first 10,000 rows of psychoth variable in namcs2001 dataset :

psychothera |
         py |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,568       95.68       95.68
          1 |        432        4.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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