Frequencies for first 10,000 rows of healthed variable in nhamcsopd2008 dataset :

       was health |
education ordered |
     or provided? |      Freq.     Percent        Cum.
------------------+-----------------------------------
               no |      4,460       44.60       44.60
              yes |      5,373       53.73       98.33
entire item blank |        167        1.67      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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