Frequencies for first 10,000 rows of psychoth variable in nhamcsopd2003 dataset :

psychothera |
         py |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,396       93.96       93.96
        yes |        604        6.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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