Frequencies for first 10,000 rows of eins variable in namcs2012 dataset :

   Do you or your |
  staff verify an |
       individual |
        patient's |
        insurance |
      eligibility |
           electr |      Freq.     Percent        Cum.
------------------+-----------------------------------
          Unknown |        231        2.31        2.31
              Yes |      7,686       76.86       79.17
               No |      2,083       20.83      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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