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

       was health |
education ordered |
     or provided? |      Freq.     Percent        Cum.
------------------+-----------------------------------
               no |      4,754       47.54       47.54
              yes |      4,984       49.84       97.38
entire item blank |        262        2.62      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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