Frequencies for first 10,000 rows of healthed variable in nhamcsopd2007 dataset :

       was health |
education ordered |
     or provided? |      Freq.     Percent        Cum.
------------------+-----------------------------------
               no |      4,605       46.05       46.05
              yes |      5,197       51.97       98.02
entire item blank |        198        1.98      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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