Frequencies for first 10,000 rows of healthed variable in nhamcsopd2006 dataset :

       was health |
education ordered |
     or provided? |      Freq.     Percent        Cum.
------------------+-----------------------------------
               No |      4,932       49.32       49.32
              Yes |      4,928       49.28       98.60
Entire item blank |        140        1.40      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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