Frequencies for first 10,000 rows of nocouns variable in nhamcsopd1993 dataset :

counseling/ |
education - |
       none |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,432       44.32       44.32
          1 |      5,568       55.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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