Frequencies for first 10,000 rows of healthed variable in nhamcsopd2010 dataset :

       was health |
education ordered |
     or provided? |      Freq.     Percent        Cum.
------------------+-----------------------------------
               no |      4,830       48.30       48.30
              yes |      4,952       49.52       97.82
entire item blank |        218        2.18      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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