Frequencies for first 10,000 rows of psychoth variable in nhamcsopd2005 dataset :

psychothera |
         py |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,386       93.86       93.86
        yes |        614        6.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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