Frequencies for first 10,000 rows of psychoth variable in nhamcsopd2000 dataset :

psychothera |
         py |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,420       94.20       94.20
          1 |        580        5.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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