Frequencies for first 10,000 rows of psychoth variable in nhamcsopd2007 dataset :

psychothera |
         py |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,308       93.08       93.08
        yes |        692        6.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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