Frequencies for first 10,000 rows of psychoth variable in namcs2007 dataset :

psychothera |
         py |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,897       98.97       98.97
        yes |        103        1.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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